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A Complete Resource Book in Chemistry for JEE Main 2017

Atul Singhal

Chapter 20

Coordination Compounds - all with Video Answers

Educators

Chapter Questions

01:01

Problem 1

Which of the following is a complex salt?
(a) $\mathrm{KCl} \cdot \mathrm{MgCl}_2 \cdot 6 \mathrm{H}_2 \mathrm{O}$
(b) $\mathrm{FeSO}_4 \cdot\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
(c) $4 \mathrm{KCN} \cdot \mathrm{Fe}(\mathrm{CN})$
(d) $\mathrm{K}_2 \mathrm{SO}_4 \cdot \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 \cdot 24 \mathrm{H}_2 \mathrm{O}$

Narayan Hari
Narayan Hari
Numerade Educator
01:34

Problem 2

The number of ions formed on dissolving one molecule of $\mathrm{FeSO}_4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$ are
(a) 3
(b) 4
(c) 5
(d) 6

Vishal Sharma
Vishal Sharma
Numerade Educator
01:34

Problem 3

What is the coordination number of metal in $\left[\mathrm{Co}(\mathrm{en})_2\right.$ $\mathrm{Cl}_2$ ]?
(a) 3
(b) 4
(c) 5
(d) 6

Patha Sharma
Patha Sharma
Numerade Educator
01:01

Problem 4

EDTA is a ligand.
(a) tetradentate
(b) hexadentate
(c) bidentate
(d) tridentate

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 5

Diethylenetriamine is a
(a) chelating agent
(b) polydentate ligand
(c) tridentate ligand
(d) all of these

Narayan Hari
Narayan Hari
Numerade Educator
01:04

Problem 6

. In the spectrochemical series, the magnitude of the crystal field splitting is maximum for which ion?
(a) $\mathrm{F}^{-}$
(b) $\mathrm{NO}_2^{-}$
(c) $\mathrm{CN}^{-}$
(d) $\mathrm{Cl}^{-}$

Narayan Hari
Narayan Hari
Numerade Educator
01:02

Problem 7

The correct name of the compound $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]\left(\mathrm{NO}_3\right)_2$ according to system is
(a) tetraamminecopper(II) dinitrite
(b) tetraamminecopper(II) nitrite
(c) cuprammonium nitrate
(d) tetramminecopper(II) nitrate

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 8

Which of the following complex species does not involve inner orbital hybridization?
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
(b) $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
(c) $\left[\mathrm{CoF}_6\right]^3$
(d) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^3$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 9

The complex $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Br}\right] \mathrm{SO}_4$ will give a white precipitate with
(a) $\mathrm{PbCl}_2$
(b) $\mathrm{AgNO}_3$
(c) KI
(d) none

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 10

Pentaamminenitrocobalt (III) cation possesses the property of
(a) physiosorption
(b) chirality
(c) linkage isomerism
(d) versatile reducing agent

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 11

The anion $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ involves which type of hybridization?
(a) $\mathrm{d}^2 \mathrm{sp}^3$
(b) $\mathrm{sp}^3 \mathrm{~d}^2$
(c) $\mathrm{d}^3 \mathrm{sp}^2$
(d) $\mathrm{sp}^2 \mathrm{~d}^3$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 12

The correct IUPAC name of $\mathrm{KAl}\left(\mathrm{SO}_4\right)_2 \cdot 12 \mathrm{H}_2 \mathrm{O}$ is
(a) aluminium potassium sulphate-12-water
(b) potassium aluminium(III) sulphate-12-water
(c) potassium aluminium(III) sulphate hydrate
(d) aluminium(III) potassium sulphate hydrate-12

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 13

Atomic numbers of Cr and Fe are respectively 25 and 26 . Which of the following is paramagnetic due to the spin of the electron?
(a) $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
(b) $\left[\mathrm{Fe}(\mathrm{CO})_5\right]$
(c) $\left[\mathrm{Cr}(\mathrm{CO})_6\right]$
(d) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$

Narayan Hari
Narayan Hari
Numerade Educator
01:07

Problem 14

The hypothetical complex chlorodiaquatriammineco-balt (III) chloride can be presented as
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right)_3\right] \mathrm{Cl}_3$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right)_2 \mathrm{Cl}\right]$
(c) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}_3\right]$
(d) $\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right)_2\right] \mathrm{Cl}_2$

Narayan Hari
Narayan Hari
Numerade Educator
01:55

Problem 15

Which disease is cured by using Gold (I) thiomaleate as a medicine?
(a) diabetes
(b) ulcer
(c) arthritis
(d) malaria

Vidushi Ahuja
Vidushi Ahuja
Numerade Educator
01:02

Problem 16

Considering $\mathrm{H}_2 \mathrm{O}$ as a weak field ligand, the number of unpaired electrons in $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ will be (Atomic no of $\mathrm{Mn}=25$ )
(a) 2
(b) 3
(c) 4
(d) 5

Narayan Hari
Narayan Hari
Numerade Educator
01:03

Problem 17

The complex used as an anti-cancer agent is
(a) mer- $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$
(b) cis- $\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right]$
(c) cis- $\mathrm{K}_2\left[\mathrm{PtCl}_2 \mathrm{Br}_2\right]$
(d) $\mathrm{Na}_2 \mathrm{CoCl}_4$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 18

Which of the following is not considered as an oganometallic compound?
(a) ferrocene
(b) cisplatin
(c) Grignard's reagent
(d) zeise's salt

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 19

Which of the following does not have an optical isomer?
(a) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_3\right]$
(b) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(c) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$
(d) $\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 20

The correct name of the given compound is
(a) $\mu$-tricarbonyl bistricarbonyl iron(0)
(b) hexacarbonyl iron (III) $\mu$-tricarbonyl ferrate(0)
(c) tricarbonyl iron ( 0 ) $\mu$-tricarbonyl iron ( 0 )
(d) all of these

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 21

The species having tetrahedral shape is
(a) $\left[\mathrm{PdCl}_4\right]^{2-}$
(b) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
(c) $\left[\mathrm{Pd}(\mathrm{CN})_4\right]^{2-}$
(d) $\left[\mathrm{NiCl}_4\right]^2$

Narayan Hari
Narayan Hari
Numerade Educator
09:38

Problem 22

Among the following complex ions, the species containing $\mathrm{Fe}^{3+}$ in strong ligand field is
(a) $\left[\mathrm{FeF}_6\right]^{3-}$
(b) $\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
(c) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
(d) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

Maryam Riaz
Maryam Riaz
Numerade Educator
02:34

Problem 23

Which one of the following is a correct representation of tetraamminecopper(II) hexacyanoferrate(II)?
(a) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]_2$
(b) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{Fe}(\mathrm{CN})_6\right]_2$
(c) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
(d) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:01

Problem 24

The complex compound used in the chemotherapy of cancer is
(a) cis-[Pt $\left.{ }^{1 \mathrm{~V}}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_4\right]$
(b) trans-[ $\left[\mathrm{Pt}^{\mathrm{II}}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
(c) cis-[ $\left[\mathrm{Pt}^{\mathrm{IV}}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}_2$
(d) cis-[Pt $\left.\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 25

An example of hexadentate ligand is
(a) iminodiacetate ion
(b) 2, 2'bipyridyl
(c) dimethyl glyoxime
(d) ethylene diamine tetraacetate ion

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 26

Haemoglobin, a complex containing iron is a const-ituent of blood. The oxidation state of iron in the complex is
(a) +1
(b) +2
(c) +3
(d) +4

Narayan Hari
Narayan Hari
Numerade Educator
01:10

Problem 27

The water soluble complex among the following is
(a) $\left[\mathrm{Ni}(\mathrm{HDMG})_2 \mathrm{Cl}_2\right]$
(b) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
(c) $\left[\mathrm{Ni}(\mathrm{HDMG})_2\right]$
(d) $\left[\mathrm{Pd}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 28

The correct IUPAC name of $\mathrm{AlCl}_3(\mathrm{EtOH})_4$ is
(a) Aluminium (II) chloride-4-ethanol
(b) Aluminium(III) chloride-4-ethanol
(c) Aluminium(IV) chloride-4-hydroxy ethane
(d) Aluminium chloride-4-ethanol

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 29

Which is not a pi-acceptor ligands among the following ligands $\left(\mathrm{CH}_3\right)_3 \mathrm{P}, \mathrm{NO}^{+}, \mathrm{CN}^{-}$and $\mathrm{I}_3^{-}$?
(a) $\mathrm{CN}^{-}$
(b) $\mathrm{I}_3^{-}$
(c) $\left(\mathrm{CH}_3\right)_3 \mathrm{P}$
(d) $\mathrm{NO}^{+}$

Narayan Hari
Narayan Hari
Numerade Educator
02:02

Problem 30

The formula of a carbonyl complex of cobalt (CO) $\mathrm{Co}-\mathrm{Co}(\mathrm{CO})_{\mathrm{n}}$ in which there is single covalent $\mathrm{CO}-$ CO bond is
(a) $\mathrm{Co}_2(\mathrm{CO})_8$
(b) $\mathrm{Co}_2(\mathrm{CO})_{10}$
(c) $\mathrm{Co}(\mathrm{CO})_4$
(d) $\mathrm{Co}(\mathrm{CO})_8$

Maryam Riaz
Maryam Riaz
Numerade Educator
01:02

Problem 31

The effective atomic number (EAN) of ${ }_{24} \mathrm{Cr}$ in $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$ is
(a) 24
(b) 27
(c) 30
(d) 33

Narayan Hari
Narayan Hari
Numerade Educator
00:39

Problem 32

The IUPAC name for $\left[\mathrm{Be}_4 \mathrm{O}\left(\mathrm{CH}_3 \mathrm{COO}\right)_6\right]$ is
(a) Basic beryllium acetate(II)
(b) hexa- $\mu$-hexakis (acetato) beryllium(II)
(c) hexa- $\mu$-acetato( $\left.\mathrm{O}, \mathrm{O}^{\prime}\right)$ - $\mu_4$-oxotetraberyllium(II)
(d) hexaacetato- $\mu$-oxoberyllium(II)

Raghvendra Singh
Raghvendra Singh
Numerade Educator
01:00

Problem 33

The structure of iron pentacarbonyl is
(a) square planar
(b) trigonal bipyramid
(c) triangular
(d) none

Alkendra Singh
Alkendra Singh
Numerade Educator
00:37

Problem 34

The two complex given below are
(a) geometrical isomers
(b) position isomers
(c) optical isomers
(d) identical

Alkendra Singh
Alkendra Singh
Numerade Educator
01:03

Problem 35

The oxidation state of oxygen in $\mathrm{O}_2\left[\mathrm{PtF}_6\right]$ is
(a) $-1 / 2$
(b) +2
(c) $+1 / 2$
(d) +1

Narayan Hari
Narayan Hari
Numerade Educator
02:39

Problem 36

A 0.01 M complex of $\mathrm{CoCl}_2$ and $\mathrm{NH}_3$ (molar ratio $1: 4)$ is found to have effective molarity of 0.02 M (evaluated from colligative property). What is the formula of the complex?
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$
(c) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}_3$
(d) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:01

Problem 37

The correct IUPAC name of $\mathrm{Mn}_3(\mathrm{CO})_{12}$ is
(a) manganic dodecacarbonyl (0)
(b) dodecacarbonyl trimanganese (0)
(c) dodecacarbonyl manganic (II)
(d) dodecacarbonyl manganate (0)

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 38

If $\mathrm{NH}_4 \mathrm{OH}$ is added to the $\left(\mathrm{PtCl}_4\right)^2$ ion, the complex formed represents
(a) zero dipole
(b) infinite dipole
(c) finite dipole
(d) all of these

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 39

The geometry of $\mathrm{Ni}(\mathrm{CO})_4$ and $\mathrm{Ni}\left(\mathrm{PPh}_3\right)_2 \mathrm{Cl}_2$ are
(a) both square planar
(b) tetrahedral and square planar
(c) both tetrahedral
(d) square planar and tetrahedral

Narayan Hari
Narayan Hari
Numerade Educator
01:02

Problem 40

The phenomenon of optical activity will be shown by
a.figure cant copy
b.figure cant copy
c.figure cant copy
(d) None of these

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 41

The IUPAC name for $\mathrm{K}_2\left[\mathrm{OsCl}_5 \mathrm{~N}\right]$ is
(a) potassium pentachloroazidoosmate(VIII)
(b) potassium pentachloroazidoosmate(VI)
(c) potassium pentachloronitridoosmate(VI)
(d) potassium nitroosmate(III)

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 42

Which of the following is an organometallic compound?
(a) lithium methoxide
(b) lithium acetate
(c) lithium dimethylamide
(d) methyl lithium

Narayan Hari
Narayan Hari
Numerade Educator
01:02

Problem 43

. The number of d electrons in $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}[$ atomic no.
of $\mathrm{Cr}=24]$ is
(a) 2
(b) 3
(c) 4
(d) 5

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 44

$\left[\mathrm{Fe}^{11}\left(\mathrm{O}_2\right)(\mathrm{CN})_4 \mathrm{Cl}\right]^{-}$is named as
(a) chlorotetracyanodioxoferrate(II) ion
(b) chlorotetracyanoperoxoferrate(II) ion
(c) chlorotetracyanosuperoxoferrate(II) ion
(d) chlorotetracyanooxoferrate(II) ion

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 45

Which one has the highest paramagnetism among the following ions?
(a) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
(b) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(c) $\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(d) $\left[\mathrm{Zn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 46

The compound which does not show paramagnetism is
(a) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}_2$
(b) $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right] \mathrm{Cl}$
(c) NO
(d) $\mathrm{NO}_2$

Narayan Hari
Narayan Hari
Numerade Educator
01:08

Problem 47

According to IUPAC nomenclature sodium nitroprusside is named as
(a) sodium pentacyanonitrosyl ferrate (II)
(b) sodium pentacyanonitrosyl ferrate (III)
(c) sodium nitroferriccyanide
(d) sodium nitroferrocyanide

Narayan Hari
Narayan Hari
Numerade Educator
01:11

Problem 48

The correct name for the coordination compound, $\left[\mathrm{Cr}(\mathrm{en})_3\right]\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$ is
(a) tris-(ethylenediamine)chromate(III) trioxalato-cobalt(III)
(b) tris-(ethylenediamine) chromium(III)trioxalato-co-baltate (III)
(c) tris-(ethylenediamine)chromate(III)trioxalatocobaltate(III)
(d) tris-(ethylenediamine)chromaium(III)trioxalatocobalt(III)

Narayan Hari
Narayan Hari
Numerade Educator
01:05

Problem 49

The complex ion $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$exhibits
(a) optical isomerism and linkage isomerism
(b) cis-trans isomerism and optical isomerism
(c) cis-trans isomerism and linkage isomerism
(d) cis-trans isomerism only

Narayan Hari
Narayan Hari
Numerade Educator
01:28

Problem 50

. Which of the following species has a square planar structure?
(a) $\left[\mathrm{SF}_6\right]$
(b) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
(c) $\left[\mathrm{BeF}_4\right]^{2-}$
(d) $\left[\mathrm{Hg}\left(\mathrm{NH}_3\right)_2\right] \mathrm{Cl}_2$

Maryam Riaz
Maryam Riaz
Numerade Educator
01:29

Problem 51

Oxidation number of Cr in the following complex is
figure cant copy
(a) 3
(b) 6
(c) 4
(d) 5

Patha Sharma
Patha Sharma
Numerade Educator
01:29

Problem 52

In the complex ion, $\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_2\left(\mathrm{H}_2 \mathrm{O}\right)_2\right]^{-}$, the oxidation number of Cr is
(a) +1
(b) +2
(c) +3
(d) +4

Patha Sharma
Patha Sharma
Numerade Educator
01:01

Problem 53

The correct IUPAC name for the complex ion [ CoCl $\left.(\mathrm{ONO})(\mathrm{en})_2\right]^{+}$is
(a) bis(ethylenediamine)chloronitrito-O-cobalt (III) ion
(b) bis(ethylenediamine)chloronitrito-O-cobaltate (III) ion
(c) chlorodiethyldiamine nitrite-O-cobalt(III) ion
(d) chlorodiethyl diamine nitrocobalt(III) ion

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 54

The IUPAC name for $\left[\mathrm{Ru}\left(\mathrm{NH}_3\right)_2(\mathrm{en})\left(\mathrm{NO}_3\right)_2\right]$ is
(a) diammine(ethylenediamine) nitratoruthenium(III)
(b) diammine(ethylenediamine)ruthenium (II) nitrate
(c) diamminebis(ethylenediamine) ruthenium(III) nitrate
(d) (ethylenediamine) diamineruthenium(II)nitrate

Narayan Hari
Narayan Hari
Numerade Educator
01:59

Problem 55

Which one of the following is true?
(a) The charge on the complex ion in $\mathrm{K}_2\left[\mathrm{PtCl}_4\right]$ is +2
(b) The coordination number of Hg in $\left[\mathrm{Hg}(\mathrm{en})_2\right]^{2+}$ is 4 (here en is ethylenediamine)
(c) The oxidation number of iron in $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^4$ is +6 .
(d) In transition metal complexes, ligands act as lewis acid

Aadit Sharma
Aadit Sharma
Numerade Educator
01:03

Problem 56

The compounds shown in the diagram are
(a) linkage isomers
(b) resonating forms
(c) positional isomers
(d) coordination isomers

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 57

Optical isomerism is not shown by the complex
(a) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$(cis-form)
(b) $\left[\mathrm{Cr}\left(\mathrm{en}_3\right)\right]^{3+}$
(c) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$(trans-form)
(d) $\left[\mathrm{Cr}(\mathrm{ox})_3\right]^3$

Narayan Hari
Narayan Hari
Numerade Educator
01:08

Problem 58

$\left[\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \mathrm{~Pb}(\mathrm{SCN})_2\right]$ and $\left[\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \mathrm{~Pb}(\mathrm{NCS})_2\right]$ are
(a) linkage isomers
(b) coordination isomers
(c) ionization isomers
(d) geometrical isomer

Raghvendra Singh
Raghvendra Singh
Numerade Educator
01:01

Problem 59

Formula of ferrocene is
(a) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^4$
(b) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3+}$
(c) $\left[\mathrm{Fe}(\mathrm{CO})_s\right]$
(d) $\left[\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \mathrm{Fe}\right]$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 60

The oxidation state of Mo in its oxo-complex species $\left[\mathrm{Mo}_2 \mathrm{O}_4\left(\mathrm{C}_2 \mathrm{H}_4\right)_2\left(\mathrm{H}_2 \mathrm{O}\right)_2\right]^{2-}$ is
(a) +2
(b) +3
(c) +4
(d) +5

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 61

In photography, hypo is used in the reduction of
(a) Ag from AgBr
(b) AgBr into $\mathrm{Ag}_2 \mathrm{SO}_4$
(c) AgBr into soluble thiosulphate complex
(d) both (b) and (c)

Narayan Hari
Narayan Hari
Numerade Educator
01:04

Problem 62

In the silver plating of copper, $\mathrm{K}\left[\mathrm{Ag}(\mathrm{CN})_2\right]$ is used instead of $\mathrm{AgNO}_3$. The reason is
(a) less availability of $\mathrm{Ag}^{+}$ions, as Cu cannot displace Ag from $\left[\mathrm{Ag}(\mathrm{CN})_2\right]^{-}$ion
(b) more voltage is required
(c) a thin layer of Ag is formed on Cu
(d) $\mathrm{Ag}^{+}$ions are completely removed from solution

Narayan Hari
Narayan Hari
Numerade Educator
09:38

Problem 63

Among the following complex ions, the one with the highest paramagnetism is
(a) $\left[\mathrm{FeF}_6\right]^{2+}$
(b) $\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{2+}$
(c) $\left[\mathrm{Zn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(d) $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

Maryam Riaz
Maryam Riaz
Numerade Educator
01:24

Problem 64

The ligand shown here is
figure cant copy

(a) Tridendate
(b) 1, 10-phenanthroline
(c) 1,10-phenanthrine
(d) 2, 2-dipyridyl

Aadit Sharma
Aadit Sharma
Numerade Educator
01:01

Problem 65

. What does the complex, tris-(ethylenediamine)cobalt (III) chloride exhibit?
(a) cis-trans isomerism
(b) fac-mer isomerism
(c) linkage isomerism
(d) optical isomerism

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 66

The EAN of platinum in potassium hexachloroplatinate (IV) is
(a) 46
(b) 86
(c) 36
(d) 84

Narayan Hari
Narayan Hari
Numerade Educator
02:17

Problem 67

Which of the following are diamagnetic?
(1) $\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
(2) $\mathrm{K}_3\left[\mathrm{Cr}(\mathrm{CN})_6\right]$
(3) $\mathrm{K}_3\left[\mathrm{Co}(\mathrm{CN})_6\right]$
(4) $\mathrm{K}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$
Select the correct answer using the codes given below:
(a) 1 and 2
(b) 2, 3 and 4
(c) 1,3 and 4
(d) 2 and 4

Maryam Riaz
Maryam Riaz
Numerade Educator
01:32

Problem 68

Which one of the following can show optical isomerism?
(a) $\mathrm{K}_5\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
(b) $\mathrm{Cr}\left[\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
(c) $\mathrm{FeSO}_4 \cdot 7 \mathrm{H}_2 \mathrm{O}$
(d) $\mathrm{K}_3\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$

Narayan Hari
Narayan Hari
Numerade Educator
01:06

Problem 69

Which of the following will give four isomers?
(a) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Br}$
(b) $\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(c) $\left[\mathrm{Co}\left(\mathrm{PPh}_3\right)_2\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(d) $\left[\mathrm{Co}(\mathrm{en})_3\right] \mathrm{Cl}_3$

Narayan Hari
Narayan Hari
Numerade Educator
01:02

Problem 70

Which one of the following high spin complexes has the largest CFSE (Crystal Field Stabilization Energy)?
(a) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(b) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
(c) $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{+}$
(d) $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

Narayan Hari
Narayan Hari
Numerade Educator
02:46

Problem 71

Which one is the most likely structure of $\mathrm{CrCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O}$ is $1 / 3$ of total chlorine of the compound is precipitated by adding $\mathrm{AgNO}_3$ to its aqueous solution?
(a) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{Cl}_3\right] \cdot\left(\mathrm{H}_2 \mathrm{O}\right)_3$
(b) $\mathrm{CrCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O}$
(c) $\left[\mathrm{CrCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right] \mathrm{Cl}_2 \cdot \mathrm{H}_2 \mathrm{O}$
(d) $\left[\mathrm{CrCl}_2\left(\mathrm{H}_2 \mathrm{O}\right)_4\right] \cdot \mathrm{Cl}_2 \mathrm{H}_2 \mathrm{O}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:01

Problem 72

Tetrahedral complexes of the types of $\left[\mathrm{Ma}_4\right]$ and [ $\mathrm{Ma}_3 \mathrm{~b}$ ] (here $\mathrm{M}=$ Metal, $\mathrm{a}, \mathrm{b}=$ Achiral ligands) are not able to show optical isomerism because
(a) these molecules/ions have non super imposable mirror images
(b) these molecules possess a centre of symmetry
(c) these molecules/ions possess a plane of symmetry and hence are achiral
(d) these molecules/ions possess $\mathrm{C}_{\mathrm{n}}$ axis of symmetry

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 73

The complex salt having the molecular composition $\left[\mathrm{Co}\left(\mathrm{NO}_2\right)(\mathrm{SCN})(\mathrm{en})_2\right] \mathrm{Br}$ exhibits
(a) linkage isomerism only
(b) ionization isomerism only
(c) cis-trans isomerism only
(d) all of these

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 74

Isomerism shown by octahedral complex $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right.$ $\left.\mathrm{Br}_2\right] \mathrm{Cl}$ are
(a) geometrical and ionization
(b) optical and ionization
(c) geometrical and optical
(d) only geometrical

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 75

Which one of the following does not obey EAN rule?
(a) $\mathrm{V}(\mathrm{CO})_6$
(b) $\mathrm{Mn}_2(\mathrm{CO})_{10}$
(c) $\mathrm{Fe}(\mathrm{CO})_5$
(d) $\mathrm{K}_4 \mathrm{Fe}(\mathrm{CN})_6$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 76

The complex ion which has no d electrons in the central metal atom is (Atomic number $\mathrm{Cr}=24$, $\mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27$ )
(a) $\left[\mathrm{MnO}_4\right]^{-}$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3^{+}}$
(c) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^5$
(d) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

Narayan Hari
Narayan Hari
Numerade Educator
01:46

Problem 77

Which of the following statement is incorrect?
(a) in $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$, the ligand has satisfied both primary and secondary valencies of ferric ion
(b) in $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ the ligand has satisfied only the secondary valency of ferric ion
(c) in $\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ the ligand has satisfied both primary and secondary valencies of ferrous ion
(d) in $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right] \mathrm{SO}_4$, the ligand has satisfied only the secondary valency of copper

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
00:56

Problem 78

The number of chloride ions produced by the complex tetraamminechloroplatinum(IV) chloride in an aqueous solution is
(a) 1
(b) 2
(c) 3
(d) 4

Alkendra Singh
Alkendra Singh
Numerade Educator
01:06

Problem 79

While $\mathrm{Ti}^{3^{+}}, \mathrm{V}^{3^{+}}, \mathrm{Fe}^{3^{+}}$and $\mathrm{Co}^{2^{+}}$can afford a large number of tetrahedral complexes, $\mathrm{Cr}^{3+}$ never does this, the reason being
(a) crystal field stabilisation energy in octahedral vis-à-vis tetrahedral $\mathrm{Cr}^{3+}$ system plays the deciding role
(b) $\mathrm{Cr}^{3^{+}}$forces high crystal field splitting with a varieties of ligands
(c) electronegativity of $\mathrm{Cr}^{3+}$ is the largest among these trivalent 3d-metals and so chromium prefers to be associated with as many ligands as its radius permits
(d) both (b) and (c)

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 80

The blue colour obtained in the Lassaigne's test is due to formation of the compound
(a) $\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3$
(b) $\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
(c) $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
(d) $\mathrm{Fe}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]_4$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 81

. Which one of the following octahedral complexes will not show geometric isomerism? (A and B are monodentate ligands)
(a) $\left[\mathrm{MA}_4 \mathrm{~B}_2\right]$
(b) $\left[\mathrm{MA}_5 \mathrm{~B}\right]$
(c) $\left[\mathrm{MA}_2 \mathrm{~B}_4\right]$
(d) $\left[\mathrm{MA}_3 \mathrm{~B}_3\right]$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 82

The formula of tetrachlorodiammineplatinum(IV), is
(a) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2\right] \mathrm{Cl}_4$
(b) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_4\right]$
(c) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}_2$
(d) $\mathrm{K}_4\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_4\right]$

Narayan Hari
Narayan Hari
Numerade Educator
00:24

Problem 83

The possible numbers of isomers for the complex $\left[\mathrm{MCl}_2 \mathrm{Br}_2\right] \mathrm{SO}_4$ will be
(a) 5
(b) 4
(c) 3
(d) 2

Alkendra Singh
Alkendra Singh
Numerade Educator
01:01

Problem 84

Predict which is the strongest ligand from the stability constant (hypothetical values) given below?
(a) $\mathrm{Cu}^{2+}+4 \mathrm{H}_2 \mathrm{O} \rightleftharpoons\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]^{2^{+}}, \mathrm{K}=9.5 \times 10^8$
(b) $\mathrm{Cu}^{2+}+2 \mathrm{en} \rightleftharpoons\left[\mathrm{Cu}(\mathrm{en})_2\right]^{2^{+}}, \quad \mathrm{K}=3.0 \times 10^{15}$
(c) $\mathrm{Cu}^{2+}+4 \mathrm{CN} \rightleftharpoons\left[\mathrm{Cu}(\mathrm{CN})_4\right]^2, \quad \mathrm{~K}=2.0 \times 10^{27}$
(d) $\mathrm{Cu}^{2+}+4 \mathrm{NH}_3 \rightleftharpoons\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{+}, \mathrm{K}=4.5 \times 10^{11}$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 85

. In which of the following pairs, the EAN of the central metal atom is not the same?
(a) $\left[\mathrm{FeF}_6\right]^{3+}$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
(b) $\left[\mathrm{Fe}\left(\mathrm{CN}_6\right)\right]^{3-}$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4^{-}}$
(c) $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ and $\left[\mathrm{Cr}(\mathrm{CN})_6\right]^{3-}$
(d) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{-}$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 86

Name the metal $M$ which is extracted on the basis of following reactions:
$4 \mathrm{M}+8 \mathrm{CN}^{-}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2 \longrightarrow 4\left[\mathrm{M}(\mathrm{CN})_2\right]^{-1}+4 \mathrm{OH}^{-}$ $2\left[\mathrm{M}(\mathrm{CN})_2\right]^{-1}+\mathrm{Zn} \longrightarrow\left[\mathrm{Zn}(\mathrm{CN})_4\right]^{2-}+2 \mathrm{M}$
(a) Ag
(b) Cu
(c) Hg
(d) Ni

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 87

Which of the following complex ions will not show optical activity?
(a) $\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]^{+}$
(b) $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
(c) $\left[\mathrm{Pt}(\mathrm{Br})(\mathrm{Cl})(\mathrm{I})\left(\mathrm{NO}_2\right)(\mathrm{Py}) \mathrm{NH}_3\right]$
(d) cis-[Co (en) $\left.2_2 \mathrm{Cl}_2\right]^{+}$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 88

The number of ions produced from one molecule of $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_5 \mathrm{Br}\right] \mathrm{Br}_3$ in the aqueous solution will be
(a) 4
(b) 5
(c) 6
(d) 7

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 89

The stability constants of the complexes formed by a metal ions $\left(\mathrm{M}^{2+}\right)$ with $\mathrm{NH}_3, \mathrm{CN}^{-}, \mathrm{H}_2 \mathrm{O}$ and 'en' are of the order of $10^{11}, 10^{27}, 10^{15}$ and $10^8$ respectively. Then (en = ethylene diamine)
(a) en is the strongest ligand
(b) these values cannot predict the strength of the ligand
(c) $\mathrm{CN}^{-}$is the strongest ligand
(d) all ligands are equally strong

Narayan Hari
Narayan Hari
Numerade Educator
00:20

Problem 90

. For a complex $\mathrm{MA}_3 \mathrm{~B}_3$ possessing a trigonal prismatic geometry, the number of possible isomers are
(a) 3
(b) 4
(c) 5
(d) 6

Alkendra Singh
Alkendra Singh
Numerade Educator
01:42

Problem 91

The coordination number and oxidation number of M in the compound $\left[\mathrm{M}\left(\mathrm{SO}_4\right)\left(\mathrm{NH}_3\right)_5\right]$ will be
(a) 6 and 3
(b) 2 and 6
(c) 6 and 2
(d) 3 and 6

Patha Sharma
Patha Sharma
Numerade Educator
01:33

Problem 92

The complex with spin-only magnetic moment of $\sim 4.9$ B.M. is
(a) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3+}$
(b) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3^{+}}$
(c) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{-}$
(d) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{]^{+}}$

Patha Sharma
Patha Sharma
Numerade Educator
00:58

Problem 93

The number of isomers possible for complex $\mathrm{K}_2[\mathrm{Pd}$ $\left.\mathrm{Cl} \mathrm{Br}(\mathrm{SCN})_2\right]$ is
(a) 1
(b) 2
(c) 3
(d) 4

Maryam Riaz
Maryam Riaz
Numerade Educator
00:36

Problem 94

. Which of the following will have three stereo-isomeric forms?
(1) $\left[\mathrm{Cr}\left(\mathrm{NO}_3\right)_3\left(\mathrm{NH}_3\right)_3\right]$
(2) $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$
(3) $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_2 \mathrm{Cl}_2\right]$
(4) $\left[\mathrm{Co}\left(\mathrm{en}_2\right) \mathrm{ClBr}\right]$
(Here, en = ethylene diamine)
(a) 1 and 2
(b) 1 and 3
(c) 1 and 4
(d) 3 and 4

Alkendra Singh
Alkendra Singh
Numerade Educator
01:19

Problem 95

The value of magnetic moment for a complex ion is 1.73 BM. The complex ion is
(a) $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^4$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{+}$
(c) $\left[\mathrm{MnF}_6\right]^3$
(d) $\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}\right]^2$

Patha Sharma
Patha Sharma
Numerade Educator
01:01

Problem 96

The number of unpaired electrons in the complex ion $\left[\mathrm{CoF}_6\right]^{3-}$ is (Atomic number of $\mathrm{Co}=27$ )
(a) 4
(b) zero
(c) 2
(d) 3

Narayan Hari
Narayan Hari
Numerade Educator
01:04

Problem 97

. In the silver plating of copper, $\mathrm{K}\left[\mathrm{Ag}(\mathrm{CN})_2\right]$ is used instead of $\mathrm{AgNO}_3$. The reason is
(a) less availability of $\mathrm{Ag}^{+}$ions, as Cu cannot displace Ag from $\left[\mathrm{Ag}(\mathrm{CN})_2\right]$ ion
(b) more voltage is required
(c) a thin layer of Ag is formed on Cu
(d) $\mathrm{Ag}^{+}$ions are completely removed from solution

Narayan Hari
Narayan Hari
Numerade Educator
02:56

Problem 98

Which of the following will exhibit geometrical isomerism? (M stands for a metal, and a and b are achiral ligands,
(1) $\mathrm{Ma}_2 \mathrm{~b}_2$
(2) $\mathrm{Ma}_4 \mathrm{~b}_2$
(3) $\mathrm{Ma}_5 \mathrm{~b}$
(4) $\mathrm{Ma}_6$
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 2 and 4

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:01

Problem 99

Why is $\left[\mathrm{Ni}(\mathrm{en})_3\right]^{2^{+}}$, nearly $10^{10}$ times more stable than $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ ? (en = enthlene diamine)
(a) $\mathrm{NH}_3$ is the weakest ligand
(b) 'en' is a chelating ligand and forms thermody namically more stable complexes
(c) six $\mathrm{NH}_3$ ligands cause steric hindrance around the $\mathrm{Ni}^2{ }^{+}$centre
(d) $\mathrm{NH}_3$ evaporates easily and causes instability to the $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{+}$complex

Narayan Hari
Narayan Hari
Numerade Educator
02:12

Problem 100

When concentrated HCl is added to a solution of $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{+}$ion, an intense blue colour develops due to the formation of which one of the following?
(a) $\left[\mathrm{CoCl}_4\right]^2$
(b) $\left[\mathrm{CoCl}_6\right]^{4-}$
(c) $\left[\mathrm{CoCl}\left(\mathrm{H}_2 \mathrm{O}\right)_3\right]^{+}$
(d) $\left[\mathrm{CoCl}_2\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]$

Aswathy M
Aswathy M
Numerade Educator
01:28

Problem 101

Which one of the following complexes is diamagnetic in nature?
(1) $\mathrm{K}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$
(2) $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]\left(\mathrm{NO}_3\right)_2$
(3) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
(4) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}_2$

Select the correct answer
(a) 1 and 2
(b) 2 and 3
(c) 1,2 and 4
(d) 1, 3 and 4

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 102

The oxidation number of Fe in $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}, \mathrm{Cr}$ in $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]$ and Ni in $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ are respectively
(a) $0,+3,+2$
(b) $+3,+3,0$
(c) $+3,0,+3$
(d) $+2,+3,0$

Narayan Hari
Narayan Hari
Numerade Educator
03:19

Problem 103

The coordination number of $\mathrm{Ni}^{2+}$ is 4 .
$\mathrm{NiCl}_2+\mathrm{KCN}$ (excess) $\longrightarrow \mathrm{A}$ (Cyano complex) $\mathrm{NiCl}_2+$ conc. HCl (excess) $\longrightarrow \mathrm{B}$ (chloro complex) The IUPAC name of A and B are
(a) potassiumtetracyanonickelate(II), potassiumtetrachloronickelate (II)
(b) tetracyanopotassiumnickelate (II), tetrachloropota-ssiumnickelate(II)
(c) tetracyanonickel(II), tetrachloronickel(II)
(d) potassium tetracyanonickel(II), potassium tetra-chloronickel(II)

Patha Sharma
Patha Sharma
Numerade Educator
03:23

Problem 104

Predict the correct statement about A and B in the above question?
(1) A is diamagnetic and B is paramagnetic with two unpaired electrons
(2) A is diamagnetic and B is paramagnetic with one unpaired electron
(3) The hybridization of A and B are $\mathrm{dsp}^2$ and $\mathrm{sp}^3$ respectively
(4) The hybridization of A and B are sp ${ }^3$ and $\mathrm{dsp}^2$ respectively
(a) 1 and 3
(b) 2 and 4
(c) 2 and 3
(d) 3 and 4

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
02:46

Problem 105

In the complex $\left[\mathrm{Cu}(\mathrm{CN})_4\right]^2$ the hybridization state, oxidation state and number of unpaired electrons are
(a) $\mathrm{dsp}^2,+1,1$
(b) $\mathrm{sp}^3,+1$, zero
(c) $\mathrm{sp}^3,+2,1$
(d) $\mathrm{dsp}^2,+2$, zero

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:22

Problem 106

Consider the following complex $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_5 \mathrm{CO}_3\right] \mathrm{ClO}_4$ The coordination number, oxidation number, number of d electrons and number of unpaired d electrons on the metal are, respectively
(a) $6,3,6,0$
(b) $6,3,6,3$
(c) $6,0,6,3$
(d) $6,2,6,3$

Alkendra Singh
Alkendra Singh
Numerade Educator
01:05

Problem 107

Among $\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{-2}$ and $\left[\mathrm{NiCl}_4\right]^{2-}$
(a) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ are diamagnetic and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^2$ is paramagnetic
(b) $\left[\mathrm{NiCl}_4\right]^{-2}$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{-2}$ are diamagnetic and $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ is paramagnetic
(c) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{NiCN}_4\right]^{2-}$ are diamagnetic and $\left[\mathrm{Ni}(\mathrm{Cl})_4\right]^{2-}$ is paramagnetic
(d) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ is diamagnetic and $\left[\mathrm{NiCl}_4\right]^{2-}$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{-}$are paramagnetic

Narayan Hari
Narayan Hari
Numerade Educator
01:04

Problem 108

Consider the following spatial arrangements of the octahedral complex ion $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$.
(1)
Which of the following statements is incorrect regarding these structures?
(a) 2 and 3 are cis and trans isomers respectively
(b) 1 and 3 are enantiomers
(c) 3 and 4 have identical structures
(d) 2 and 4 are trans and cis isomers respectively

Narayan Hari
Narayan Hari
Numerade Educator
01:42

Problem 109

Which of the following pairs of isomers and types of isomerism are correctly matched?
(1) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{NO}_2\right)\right] \mathrm{Cl}_2$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5(\mathrm{ONO})\right] \mathrm{Cl}_2$ Linkage isomers
(2) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right] \quad\left[\mathrm{PtCl}_4\right]$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right] \quad\left[\mathrm{CuCl}_4\right]$ Co -ordinationIsomers
(3) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4 \quad \mathrm{Cl}_2\right] \quad \mathrm{Br}_2$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4 \quad \mathrm{Br}_2\right] \quad \mathrm{Cl}_2$ Ionisation Isomers
Select the correct answer using the codes given below:
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1,2 and 3

Narayan Hari
Narayan Hari
Numerade Educator
01:28

Problem 110

The correct order of magnetic moment (spin only values in BM) among the following is
(a) $\left[\mathrm{MnCl}_4\right]^{2-}>\left[\mathrm{CoCl}_4\right]^2>\mathrm{Fe}\left(\mathrm{CN}_6\right)^4$
(b) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}>\left[\mathrm{MnCl}_4\right]^{-}>\left[\mathrm{CoCl}_4\right]^{2-}$
(c) $\left.[\mathrm{Fe}(\mathrm{CN})]_6\right]^{-}>\left[\mathrm{CoCl}_4\right]^{-}>\left[\mathrm{MnCl}_4\right]^{--}$
(d) $\left[\mathrm{MnCl}_4\right]^{-}>\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4^{-}}>\left[\mathrm{CoCl}_4\right]^{-}$
(Atomic number of $\mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27, \mathrm{Ni}=28$ )

Narayan Hari
Narayan Hari
Numerade Educator
01:32

Problem 111

Select the correct increasing order of 10 Dq value for chromium complexes using the given codes
(1) $\left[\mathrm{Cr}(\mathrm{en})_3\right]^{3+}$
(2) $\left[\mathrm{Cr}(\mathrm{ox})_3\right]^{3-}$
(3) $\left[\mathrm{CrF}_6\right]^3$
(4) $[\mathrm{Cr}(\mathrm{dtc})]^{3+}$
(Here, dtc $=$ dithiocarbamate)
(a) 1 $<2<3<4$
(b) $3<4<2<1$
(c) $4<1<2<3$
(d) $3<1<4<2$

Patha Sharma
Patha Sharma
Numerade Educator
01:01

Problem 112

Each of the compounds $\mathrm{Pt}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_4, \mathrm{Cr}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_3$, $\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_3$ and $\mathrm{K}_2 \mathrm{PtCl}_6$ has been dissolved in water to make its 0.001 M solution. The order of their increasing conductivity in solution is
(a) $\mathrm{K}_2 \mathrm{PtCl}_6<\mathrm{Pt}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_4<\mathrm{Cr}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_3<$ $\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_3$
(b) $\mathrm{Cr}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_3<\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_3<\mathrm{Pt}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_4<$ $\mathrm{K}_2 \mathrm{PtCl}_6$
(c) $\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_3<\mathrm{K}_2 \mathrm{PtCl}_6<\mathrm{Cr}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_3<$ $\mathrm{Pt}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_4$
(d) $\mathrm{Pt}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_4<\mathrm{K}_2 \mathrm{PtCl}_6<\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_3<$ $\mathrm{Cr}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_3$

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 113

Arrange the following in order of decreasing number of unpaired electrons:
1. $\left.\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)\right]_6\right]^{+}$
2. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
3. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{--}$
4. $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3^{+}}$
(a) $4,1,2,3$
(b) $1,2,3,4$
(c) $4,2,1,3$
(d) $2,3,1,4$

Narayan Hari
Narayan Hari
Numerade Educator
02:37

Problem 114

Match the list I and II, pick the correct matching from the codes given below

List I
(a) $\left[\mathrm{Ag}(\mathrm{CN})_2\right]$
(b) $\left[\mathrm{Cu}\left(\mathrm{CN}_4\right)\right]^{3-}$
(c) $[\mathrm{Cu}(\mathrm{CN})]^3$
(d) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
(e) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4^{-}}$
List II
1. square planar and 1.73 BM
2. linear and zero
3. octahedral and zero
4. tetrahedral and zero
5. octahedral and 1.73 BM
(a) a-4, b-2, c-5, d-3, e-1
(b) a-4, b-5, c-2, d-1, e-3
(c) a-2, b-4, c-5, d-1, e-3
(d) a-5, b-4, c-1, d-3, e-2

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
04:37

Problem 115

. In the complexes $\left[\mathrm{Cr}(\mathrm{CN})_6\right]^3,\left[\mathrm{CuCl}_4\right]^{-},\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_2\right]^{+}$. The number of unpaired electrons are respectively
(a) 1,3 and 0
(b) 3,2 and 1
(c) 3,2 and 0
(d) 3,1 and 0

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:02

Problem 116

Which of the following are paramagnetic tetrahedral
(a) $\left[\mathrm{FeCl}_4\right]^{-}$
(b) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ species?
(c) $\left[\mathrm{NiCl}_4\right]^{--}$
(d) $\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_4\right]^{2+}$

Narayan Hari
Narayan Hari
Numerade Educator
04:14

Problem 117

Which of the following are diamagnetic?
(a) $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(b) $\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
(c) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
(d) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:07

Problem 118

The proposed complex with the nomenclature chlorodiaquatriammine cobalt (III) chloride can be represented wrongly as
(a) $\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right)_2\right] \mathrm{Cl}_2$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}_3\right]$
(c) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(d) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{H}_2 \mathrm{O}\right)_3\right] \mathrm{Cl}_3$

Narayan Hari
Narayan Hari
Numerade Educator
03:02

Problem 119

Which of the following statements is/are correct regarding metal carbonyl?
(a) $\mathrm{In}_{\mathrm{Fe}_3(\mathrm{CO})_{12}}$ no. of $\mathrm{Fe}-\mathrm{Fe}$ bonds are 3
(b) $\mathrm{In} \mathrm{Mn}_2(\mathrm{CO})_{10}$ bond order of $\mathrm{Mn}-\mathrm{Mn}$ is 0
(c) $\mathrm{Fe}(\mathrm{CO})_5$ is diamagnetic
(d) $\mathrm{In} \mathrm{Fe}_2(\mathrm{CO})_4$ all bond length are same

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
03:39

Problem 120

For the complex $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
(a) Shape is tetrahedral
(b) Hybridization state of central ion is $\mathrm{sp}^3$
(c) Effective atomic number of central ion is 35
(d) Number of unpaired electrons present in the central ion is 1

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
07:10

Problem 121

Identify the coordination compounds
(a) $\mathrm{FeSO}_4 \cdot\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \cdot 6 \mathrm{H}_2 \mathrm{O}$
(b) $\mathrm{Fe}(\mathrm{CN})_2 \cdot 4 \mathrm{KCN}$
(c) $\mathrm{KCl} \cdot \mathrm{MgCl}_2 \cdot 6 \mathrm{H}_2 \mathrm{O}$
(d) $\mathrm{CuSO}_4 \cdot 4 \mathrm{NH}_3$

Maryam Riaz
Maryam Riaz
Numerade Educator
00:23

Problem 122

The main draw back of valence bond theory is/are
(a) It cannot explain magnetic properties of co-ordination compounds
(b) It cannot distinguish between high spin and low spin complex
(c) It does not provide an answer to the origin of characteristic colours of complex ions
(d) It is a qualitative approach

Alkendra Singh
Alkendra Singh
Numerade Educator
01:01

Problem 123

The coordination compound is a complex substance which contains a central metal atom or ion surrounded by oppositely charged ions or neutral molecules. These compounds exhibit structural as well as stereoisomerism. Hybridisation theory explains the geometry of the complex. Crystal field theory explains the colour of complexes and magnetic properties.
Which one of the following does not show optical activity?
(a) $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
(b) $\left[\mathrm{Pt}(\mathrm{Br})(\mathrm{Cl})(\mathrm{I})\left(\mathrm{NO}_2\right)\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{~N}\right)\left(\mathrm{NH}_3\right)\right]^{-}$
(c) $\mathrm{Cis}\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]^{+}$
(d) $\mathrm{Cis}\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$

Narayan Hari
Narayan Hari
Numerade Educator
02:23

Problem 124

The coordination compound is a complex substance which contains a central metal atom or ion surrounded by oppositely charged ions or neutral molecules. These compounds exhibit structural as well as stereoisomerism. Hybridisation theory explains the geometry of the complex. Crystal field theory explains the colour of complexes and magnetic properties.

Identify the correct statement
(a) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is tetrahedral and paramagnetic
(b) $\left[\mathrm{NiCl}_4\right]^{-}$is square planar and paramagnetic
(c) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ is square planar and paramagnetic
(d) $\left[\mathrm{Cu}(\mathrm{CN})_4\right]^{3-}$ is tetrahedral and diamagnetic

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:02

Problem 125

When degenerate d-orbitals of an isolated atom/ion are brought under the impact of magnetic field of ligands, the degeneracy is lost. The two newly formed sets of d-orbitals,
depending upon nature and magnetic field of ligands are either stabilized or destabilized. The energy difference between the two sets whenever lies in the visible region of the electromagnetic spectrum, then the electronic transition $\mathrm{t}_{2 \mathrm{~g}} \rightleftharpoons \mathrm{e}_{\mathrm{g}}$ are responsible for colours of the co- ordination compounds
$\mathrm{Ti}^{3+}(\mathrm{aq})$ is purple while $\mathrm{Ti}^{+4}(\mathrm{aq})$ is colourless because
(a) The difference between $\mathrm{t}_{2 \mathrm{~g}}$ and $\mathrm{e}_{\mathrm{g}}$ of $\mathrm{Ti}^{4+}$ is quite high and does not fall in visible region.
(b) There is no crystal field effect in $\mathrm{Ti}^{4+}$
(c) $\mathrm{Ti}^{4+}$ has $\mathrm{d}^0$ configuration.
(d) $\mathrm{Ti}^{4+}$ is very small ion than $\mathrm{Ti}^{3+}$ and does not adsorb any radiation.

Narayan Hari
Narayan Hari
Numerade Educator
04:20

Problem 126

When degenerate d-orbitals of an isolated atom/ion are brought under the impact of magnetic field of ligands, the degeneracy is lost. The two newly formed sets of d-orbitals,
depending upon nature and magnetic field of ligands are either stabilized or destabilized. The energy difference between the two sets whenever lies in the visible region of the electromagnetic spectrum, then the electronic transition $\mathrm{t}_{2 \mathrm{~g}} \rightleftharpoons \mathrm{e}_{\mathrm{g}}$ are responsible for colours of the co- ordination compounds
Which of the following colour is not due to d-d transition of
(a) Yellow colour of CdS.
(b) Red colour of blood
(c) Orange colour of $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ in acidic medium.
(d) Both (a) and (c).

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:05

Problem 127

When degenerate d-orbitals of an isolated atom/ion are brought under the impact of magnetic field of ligands, the degeneracy is lost. The two newly formed sets of d-orbitals,
depending upon nature and magnetic field of ligands are either stabilized or destabilized. The energy difference between the two sets whenever lies in the visible region of the electromagnetic spectrum, then the electronic transition $\mathrm{t}_{2 \mathrm{~g}} \rightleftharpoons \mathrm{e}_{\mathrm{g}}$ are responsible for colours of the co- ordination compounds

Which of following complex ions will be coloured in aqueous state?
(a) $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{--}$
(b) $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(c) $\left[\mathrm{Sc}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
(d) Both (b) and (c)

Narayan Hari
Narayan Hari
Numerade Educator
02:10

Problem 128

Match the following
$$
\begin{array}{ll}
\text { Column-I } & \text { Column-II } \\
\hline \text { (a) }\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_4\right]^{2+} & \text { (p) } \mathrm{d}^2 \mathrm{sp}^3 \\
\text { (b) }\left[\mathrm{Cu}\left(\mathrm{CN}_4\right]^{3-}\right. & \text { (q) } \mathrm{sp}^3 \\
\text { (c) }\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_6\right]^{3-} & \text { (r) Number of unpaired } \\
& \quad \text { electrons is zero } \\
\text { (d) }\left[\mathrm{FeCl}_4\right]^{-} & \text {(s) Paramagnetic } \\
& \text { (t) Diamangetic }
\end{array}
$$

Ramesh Singh
Ramesh Singh
Numerade Educator
01:56

Problem 129

Match the following
$$
\begin{array}{ll}
\text { Column-I } & \text { Column-II } \\
\hline \text { (a) }\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_2\left(\mathrm{H}_2 \mathrm{O}\right)_2\left(\mathrm{NH}_3\right)_2\right] & \text { (p) } \begin{array}{l}
\text { Number of } \\
\text { stereoisomers }
\end{array} \\
\mathrm{NO}_3 & =6 \\
\text { (b) }\left[\mathrm{Ni}(\mathrm{en})_3\right] \mathrm{Br}_3 & \text { (q) } \begin{array}{l}
\text { Linkage } \\
\text { isomerism }
\end{array} \\
\text { (c) }\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3(\mathrm{py})_3\right] \mathrm{Br}_2 & \text { (r) } \begin{array}{l}
\text { Ionization } \\
\text { isomerism }
\end{array} \\
\text { (d) }\left[\mathrm{Pt}(\mathrm{en})(\mathrm{SCN})_2\right]\left(\mathrm{NO}_3\right)_2 & \text { (s) } \begin{array}{l}
\text { Optical } \\
\text { isomerism }
\end{array} \\
& \text { (t) } \begin{array}{l}
\text { Geometrical } \\
\text { isomerism }
\end{array}
\end{array}
$$

Ramesh Singh
Ramesh Singh
Numerade Educator
02:15

Problem 130

Match the following
$$
\begin{array}{ll}
\hline \text { Column-I (Inorganic ions) } & \begin{array}{l}
\text { Column-II (can } \\
\text { get tested using } \\
\text { reagent) }
\end{array} \\
\hline \text { (a) } \mathrm{Co}^{2+} & \text { (p) } \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \\
\text { (b) } \mathrm{Cu}^{2+} & \text { (q) } \mathrm{KSCN} \\
\text { (c) } \mathrm{Fe}^{3+} & \text { (r) } \mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right] \\
\text { (d) } \mathrm{Zn}^{2+} & \text { (s) } \mathrm{KNO}_2+ \\
& \text { (t) } \mathrm{KH}_3 \mathrm{CO}_2 \mathrm{H} \\
& \text { (t) } \left.\mathrm{Hg}_2(\mathrm{SCN})_4\right] \\
\hline
\end{array}
$$

Ramesh Singh
Ramesh Singh
Numerade Educator
01:40

Problem 131

Match the following
$$
\begin{array}{ll}
\hline \text { Column-I } & \text { Column-II } \\
\hline \text { (a) }\left[\mathrm{MnCl}_6\right]^{3-} & \text { (p) One unpaired electron } \\
\text { (b) }\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} & \text { (q) } \mathrm{d}^2 \mathrm{sp}^3 \\
\text { (c) }\left[\mathrm{CoF}_6\right]^{-} & \text {(r) } \mathrm{sp}^3 \mathrm{~d}^2 \\
\text { (d) }\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2-} & \text { (s) Four unpaired electrons } \\
& \text { (t) Three unpaired electrons }
\end{array}
$$

Ramesh Singh
Ramesh Singh
Numerade Educator
01:34

Problem 132

Match the following
$$
\begin{array}{ll}
\hline \text { Column-I } & \text { Column-II } \\
\hline \text { (a) }\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right)_2\right] & \text { (p) Geometrical isomers } \\
\quad \mathrm{Cl}_2 & \\
\text { (b) }\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] & \text { (q) Paramagnetic } \\
\text { (c) }\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{Cl}\right] \mathrm{Cl} & \text { (r) Diamagnetic } \\
\text { (d) }\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2 & \text { (s) Metal ion with }+2 \\
& \begin{array}{l}
\text { oxidation state }
\end{array} \\
& \text { (t) } \begin{array}{l}
\text { sp }{ }^3 \mathrm{~d}^2 \text { hybridization } \\
\text { of central metal atom }
\end{array} \\
\hline
\end{array}
$$

Ramesh Singh
Ramesh Singh
Numerade Educator
06:19

Problem 133

Match the following
$$
\begin{array}{ll}
\hline \text { Column-I } & \text { Column-II } \\
\hline \text { (a) }\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-} & \text { (p) Octahedral } \\
\text { (b) }\left[\mathrm{MnF}_6\right]^{4-} & \text { (q) Paramagnetic } \\
\text { (c) }\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} & \text { (r) Square planar } \\
\text { (d) }\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+} & \text { (s) } \mathrm{d}^2 \mathrm{sp}^3 \text { hybridization } \\
& \text { (t) Weak field ligand. } \\
\hline
\end{array}
$$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:42

Problem 134

Match the following
$$
\begin{array}{ll}
\hline \text { Column-I } & \text { Column-II } \\
\hline \text { (a) } \mathrm{Na}_2\left[\mathrm{Pt}(\mathrm{SCN})_4\right] & \text { (p) Ionisation } \\
& \text { isomerism } \\
\text { (b) }\left[\mathrm{CrCl}_2\left(\mathrm{NH}_3\right)_4\right] \mathrm{NO}_3 & \text { (q) Linkage isomerism } \\
\text { (c) }\left[\mathrm{Pt}\left(\mathrm{NO}_2\right)(\mathrm{gly})\right. & \text { (r) Geometrical } \\
\left.\left(\mathrm{NH}_3\right)\right] & \text { isomerism } \\
\text { (d) } \mathrm{K}_3\left[\mathrm{Fe}(\mathrm{OH})_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_2\right] & \text { (s) optical isomerism } \\
& \text { (t) hydrate isomerism } \\
\hline
\end{array}
$$

Ramesh Singh
Ramesh Singh
Numerade Educator
01:01

Problem 135

The mineral (A) is $\left[\mathrm{CuCl}_2 \cdot \mathrm{xCu}(\mathrm{OH})_2\right]$. A 45.05 ml
pletely with 1.6320 g of the compound (A) whose solution of 0.5089 M HCl was required to react commolar mass is 427 . Hence, x is _____________

Narayan Hari
Narayan Hari
Numerade Educator
01:21

Problem 136

14. How many milliliters of $0.05 \mathrm{M} \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ solution are required for titration of 60 ml of 0.01 $\mathrm{M} \mathrm{ZnSO}_4$ solution, when the product of reaction is $\mathrm{K}_2 \mathrm{Zn}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]_2$ ?

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 137

For the coordination compound $\mathrm{PtCl}_4 .5 \mathrm{NH}_3$, the charge on cation is found to be +3 . How many ions are furnished on ionization of the complex?

Narayan Hari
Narayan Hari
Numerade Educator
01:01

Problem 138

In the complex $\mathrm{Fe}(\mathrm{CO})_x$, the value of $x$ is $\qquad$ ( $\mathrm{Fe}=26$ )

Narayan Hari
Narayan Hari
Numerade Educator
01:21

Problem 139

$\mathrm{Na}_2 \mathrm{O}$ has antifluorite structure. The coordination number of oxide ion is $\qquad$

Narayan Hari
Narayan Hari
Numerade Educator
00:40

Problem 140

The number of geomatrical isomers exhibited by $\mathrm{Cr}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3$ is $\qquad$ .

Maryam Riaz
Maryam Riaz
Numerade Educator
05:22

Problem 141

. Amongst the following, the total number of species which are diamagnetic is $\qquad$ .
$$
\begin{aligned}
& \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right], \mathrm{K}_3\left[\mathrm{Cr}(\mathrm{CN})_6\right], \mathrm{K}_5\left[\mathrm{Co}(\mathrm{CN})_6\right], \\
& \mathrm{K}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right],\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}, \mathrm{K}_2 \mathrm{TiF}_6\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right]^{2+}
\end{aligned}
$$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
04:33

Problem 142

The possible number of co-ordination isomers of $\mathrm{Pt}(\mathrm{Py})_4 \mathrm{CuCl}_4$ are $\qquad$ -

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
02:59

Problem 143

When excess of KCN is added to aqueous solution of copper sulphate a co-ordination compound $\mathrm{K}_{\mathrm{x}}\left[\mathrm{Cu}(\mathrm{CN})_4\right]$ is formed. The value of x is

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
05:00

Problem 144

The number of viable coordination isomers possible for the complex $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{CuCl}_4\right]$ should be ?

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:21

Problem 145

The number of unpaired electrons in the complex ion $\left[\mathrm{CoF}_6\right]^{3-}$ is

Hunza Gilgit
Hunza Gilgit
Numerade Educator
02:19

Problem 146

In $\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$, the isomerism shown is
[2002]
(a) optical
(b) ionization
(c) geometrical
(d) ligand

Maryam Riaz
Maryam Riaz
Numerade Educator
02:38

Problem 147

In the complexes $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}, \quad[2002]$ $\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ and $\left[\mathrm{FeCl}_6\right]^{3-}$, more stability is shown by
(a) $\left[\mathrm{FeCl}_6\right]^{3-}$
(b) $\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
(c) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
(d) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
00:51

Problem 148

A similarity between optical and geometrical isomerism is that
[2002]
(a) if in a compound one is present then the other will also be present
(b) each gives equal number of isomers for a given compound
(c) both are included in stereo isomerism
(d) they have no similarity

Alkendra Singh
Alkendra Singh
Numerade Educator
01:02

Problem 149

A square planar complex is formed by hybridization of which atomic orbitals?
[2002]
(a) $\mathrm{s}, \mathrm{px}, \mathrm{py}, \mathrm{dx}{ }^2-\mathrm{y}^2$
(b) s, px, py, dyz
(c) $\mathrm{s}, \mathrm{px}, \mathrm{py}, \mathrm{dz}{ }^2$
(d) s, px, py, dxy

Narayan Hari
Narayan Hari
Numerade Educator
00:51

Problem 150

The type of isomerism present in nitropentaamine chromium (III) chloride is
[2002]
(a) ionization
(b) optical
(c) polymerization
(d) linkage

Maryam Riaz
Maryam Riaz
Numerade Educator
03:05

Problem 151

In the coordination compound $\mathrm{K}_4\left[\mathrm{Ni}(\mathrm{CN})_4\right]$, the oxidation state of nickel is
[2003]
(a) -1
(b) 0
(c) +1
(d) +2

Maryam Riaz
Maryam Riaz
Numerade Educator
03:04

Problem 152

A mole of complex compound $\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}_3$ gives 3 mole of ions, when dissolved in water. One mole of the same complex reacts with two mole of $\mathrm{AgNO}_3$ solution to form two mole of AgCl (s). The structure of the complex is
[2003]
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right] \cdot 2 \mathrm{NH}_3$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \cdot \mathrm{Cl}_2$
(c) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl} .2 \mathrm{NH}_3$
(d) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}_2 \cdot 2 \mathrm{NH}_3$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:03

Problem 153

Coordination compounds have great importance in biological systems. In this context, which of the following statements is incorrect?
[2004]
(a) chlorophylls are green pigments in plants and contain calcium
(b) haemoglobin is the red pigment of blood and contains iron
(c) cyanocobalamin is vitamin $\mathrm{B}_{12}$ and contains cobalt
(d) carboxypeptidase-A is an enzyme and contains zinc

Narayan Hari
Narayan Hari
Numerade Educator
01:04

Problem 154

Which one of the following has largest number of isomers?
[2004]
(a) $\left[\mathrm{Ru}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{2+}$
(c) $\left[\operatorname{Ir}\left(\mathrm{PR}_3\right)_2 \mathrm{H}(\mathrm{CO})\right]^{2+}$
(d) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$
[ $\mathrm{R}=$ alkyl group, en = ethylenediamine $]$

Narayan Hari
Narayan Hari
Numerade Educator
03:44

Problem 155

The correct order of magnetic moments (spin only values in B.M.) among the following is
[2004]
(Atomic number of $\mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27$ )
(a) $\left[\mathrm{MnCl}_4\right]^{2-}>\left[\mathrm{CoCl}_4\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_6\right]^4$
(b) $\left[\mathrm{MnCl}_4\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_6\right]^4>\left[\mathrm{CoCl}_4\right]^{2-}$
(c) $\left.[\mathrm{Fe}(\mathrm{CN}))_6\right]^{-}>\left[\mathrm{MnCl}_4\right]^{2-}>\left[\mathrm{CoCl}_4\right]^{--}$
(d) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{-}>\left[\mathrm{CoCl}_4\right]^{2-}>\left[\mathrm{MnCl}_4\right]^{2-}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:34

Problem 156

Which one of the following complexes is an outer orbital complex?
[2004]
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
(b) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^4$
(c) $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$
(d) $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^4$

Maryam Riaz
Maryam Riaz
Numerade Educator
02:07

Problem 157

The coordination number of a central metal atom in a complex is determined by
[2004]
(a) the number of only anionic ligands bonded to the metal ion
(b) the number of ligands around a metal ion bonded pi-bonds
(c) the number of ligands around a metal ion bonded by sigma and pi-bonds
(d) the number of ligands around a metal ion bonded by sigma bonds

Hunza Gilgit
Hunza Gilgit
Numerade Educator
02:48

Problem 158

The oxidation state of Cr in $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+} \quad$ [2005]
(a) 0
(b) +1
(c) +2
(d) +3

Maryam Riaz
Maryam Riaz
Numerade Educator
01:15

Problem 159

The IUPAC name of the coordination compound $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ is
[2005]
(a) potassium hexacyanoferrate (II)
(b) potassium hexacyanoferrate (III)
(c) potassium hexacyanoiron (II)
(d) ripotassium acyanoiron (II)

Maryam Riaz
Maryam Riaz
Numerade Educator
03:14

Problem 160

Which of the following compounds shows optical isomerism?
[2005]
(a) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
(b) $\left[\mathrm{ZnCl}_4\right]^2$
(c) $\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
(d) $\left[\mathrm{Co}(\mathrm{CN})_6\right]^3-$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
03:09

Problem 161

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour?
[2005]
(a) $\left[\mathrm{Cr}(\mathrm{CN})_6\right]^{3-}$
(b) $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$
(c) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$
(d) $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
05:31

Problem 162

The value of 'spin only' magnetic moment for one of the following configurations is 2.84 BM . The correct one is
[2005]
(a) $\mathrm{d}^4$ (in strong ligand field)
(b) $\mathrm{d}^4$ (in weak ligand field)
(c) $\mathrm{d}^3$ (in weak as well as in strong fields)
(d) $\mathrm{d}^5$ (in strong ligand field)

Maryam Riaz
Maryam Riaz
Numerade Educator
01:02

Problem 163

The IUPAC name for the complex $\left[\mathrm{Co}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)_5\right]$ $\mathrm{Cl}_2$ is
[2006]
(a) nitrite-N-pentaamminecobalt(III) chloride
(b) nitrite-N-pentaamminecobalt(II) chloride
(c) pentaamminonitrite-N-cobalt(II) chloride
(d) pentaamminonitrite-N-cobalt(III) chloride

Narayan Hari
Narayan Hari
Numerade Educator
03:23

Problem 164

Nickel $(Z=28)$ combines with a uninegative monodentate ligand $\mathrm{X}^{-}$to form a paramagnetic complex $\left[\mathrm{NiX}_4\right]^2$, the number of unpaired electrons in nickel and the geometry of this complex ion is
[2006]
(a) one, tetrahedral
(b) two, tetrahedral
(c) one, square planar
(d) two, square planar

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:52

Problem 165

In $\mathrm{Fe}(\mathrm{CO})_5$, the $\mathrm{Fe}-\mathrm{C}$ bond possesses
[2006]
(a) $\pi$-character only
(b) both $\sigma$ and $\pi$ characters
(c) ionic character
(d) $\sigma$ character only

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
00:57

Problem 166

How many EDTA (ethylenediamine-tetraacetic acid) molecules are required to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion?
[2006]
(a) $\operatorname{six}$
(b) three
(c) one
(d) two

Maryam Riaz
Maryam Riaz
Numerade Educator
01:37

Problem 167

The 'spin-only' magnetic moment [in units of Bohr magneton $\left.\left(\mu_{\mathrm{B}}\right)\right]$ of $\mathrm{Ni}^{2+}$ in aqueous solution would be (Atomic number of $\mathrm{Ni}=28$ )
[2006]
(a) 2.84
(b) 4.90
(c) 0
(d) 1.73

Maryam Riaz
Maryam Riaz
Numerade Educator
01:28

Problem 168

. Which one of the following has a square planar geometry?
[2007]
(a) $\left[\mathrm{FeCl}_4\right]^{2-}$
(b) $\left[\mathrm{NiCl}_4\right]^2$
(c) $\left[\mathrm{PtCl}_4\right]^{2-}$
(d) $\left[\mathrm{CoCl}_4\right]^{2-}$

Maryam Riaz
Maryam Riaz
Numerade Educator
02:31

Problem 169

The coordination number and the oxidation state of the element ' E ' in the complex $\left[\mathrm{E}(\mathrm{en})_2\left(\mathrm{C}_2 \mathrm{O}_4\right)\right] \mathrm{NO}_2$
(Here (en) is ethylene diamine) are, respectively,
[2008]
(a) 6 and 2
(b) 4 and 2
(c) 4 and 3
(d) 6 and 3

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
02:31

Problem 170

In which of the following octahedral complexes of Co (Atomic number 27), will the magnitude of $\Delta$. be the highest?
[2008]
(a) $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$
(b) $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
(c) $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
(d) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
01:01

Problem 171

. Which of the following has an optical isomer? [2009]
(a) $\left[\mathrm{CO}(\mathrm{en})\left(\mathrm{NH}_3\right)_2\right]^{2+}$
(b) $\left[\mathrm{CO}\left(\mathrm{H}_2 \mathrm{O}\right)_4(\mathrm{en})\right]^{3+}$
(c) $\left[\mathrm{CO}(\mathrm{en})_2\left(\mathrm{NH}_3\right)_2\right]^{3+}$
(d) $\left[\mathrm{CO}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}\right]^{+}$

Narayan Hari
Narayan Hari
Numerade Educator
01:03

Problem 172

. Which of the following pairs represents linkage isomers?
[2009]
(a) $\left[\mathrm{Pd}\left(\mathrm{P} \mathrm{Ph}_3\right)_2(\mathrm{NCS})_2\right]$ and $\left[\mathrm{Pd}\left(\mathrm{P} \mathrm{Ph}_3\right)_2(\mathrm{SCN})_2\right]$
(b) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5, \mathrm{NO}_3\right] \mathrm{SO}_4$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{SO}_4\right] \mathrm{NO}_3$
(c) $\left[\mathrm{Pt} \mathrm{Cl}_2\left(\mathrm{NH}_3\right)_4\right] \mathrm{Br}_2$ and
(d) $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{Pt} \mathrm{Cl}_4^2\right]$ and $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_4\right]\left[\mathrm{CuCl}_4\right]$

Narayan Hari
Narayan Hari
Numerade Educator
03:14

Problem 173

. Which one of the following has an optical isomer?
(a) $\left[\mathrm{Zn}(\mathrm{en})\left(\mathrm{NH}_3\right)_2\right]^{2+}$
(b) $\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
(c) $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_4(\mathrm{en})\right]^{3+}$
(d) $\left[\mathrm{Zn}(\mathrm{en})_2\right]^{2+}$
(en = ethylenediamine)

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
03:49

Problem 174

A solution containing 2.675 g of $\mathrm{CoCl}_3 .6 \mathrm{NH}_3$ (molar mass $=267.5 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of $\mathrm{AgNO}_3$ to give 4.78 g of AgCl (molar mass $=143.5 \mathrm{~g} \mathrm{~mol}^{-1}$ ). The formula of the complex is (Atomic mass of $\mathrm{Ag}=108 \mathrm{u}$ ) [2010]
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
(b) $\left[\mathrm{CoCl}_2\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}$
(c) $\left[\mathrm{CoCl}_3\left(\mathrm{NH}_3\right)_3\right]$
(d) $\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right] \mathrm{Cl}_2$

Himanshu Kushwaha
Himanshu Kushwaha
Numerade Educator
04:05

Problem 175

The magnetic moment (spin only) of $\left[\mathrm{NiCl}_4\right]^{2-}$ is:
[2011]
(a) 1.41 BM
(b) 5.64 BM
(c) 1.28 BM
(d) 2.82 BM

Maryam Riaz
Maryam Riaz
Numerade Educator
03:10

Problem 176

Which of the following facts about the complex $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$ is wrong?
[2011]
(a) The complex gives white precipitate with silver nitrate solution.
(b) The complex involves $\mathrm{d}^2 \mathrm{sp}^3$ hybridisation, and is octahedral in shape.
(c) The complex is an outer orbital complex.
(d) The complex is paramagnetic.

Maryam Riaz
Maryam Riaz
Numerade Educator
02:12

Problem 177

Which among the following will be named as dibromidobis (ethylene diamine) chromium (III) bromide?
[2012]
(a) $\left[\mathrm{Cr}(\mathrm{en})_2 \mathrm{Br}_2\right] \mathrm{Br}$
(b) $\left[\mathrm{Cr}(\mathrm{en}) \mathrm{Br}_2\right] \mathrm{Br}$
(c) $\left[\mathrm{Cr}(\mathrm{en})_3\right] \mathrm{Br}_3$
(d) $\left[\mathrm{Cr}(\mathrm{en})_2 \mathrm{Br}_2\right] \mathrm{Br}$

Maryam Riaz
Maryam Riaz
Numerade Educator
01:49

Problem 178

Which of the following complex species is not expected to exihibit optical isomerism?
[2013]
(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$
(b) $\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]^{+}$
(c) $\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
(d) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$

Raghvendra Singh
Raghvendra Singh
Numerade Educator
01:29

Problem 179

The octahedral complex of a metal ion $\mathrm{M}^{3+}$ with four monodentate ligands $\mathrm{L}_1, \mathrm{~L}_2, \mathrm{~L}_3$ and $\mathrm{L}_4$ absorb wavelength in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:
[2014]
(a) $\mathrm{L}_3<\mathrm{L}_2<\mathrm{L}_4<\mathrm{L}_1$
(b) $\mathrm{L}_1<\mathrm{L}_2<\mathrm{L}_4<\mathrm{L}_3$
(c) $\mathrm{L}_4<\mathrm{L}_3<\mathrm{L}_2<\mathrm{L}_1$
(d) $\mathrm{L}_1<\mathrm{L}_3<\mathrm{L}_2<\mathrm{L}_4$

Raghvendra Singh
Raghvendra Singh
Numerade Educator
01:29

Problem 179

The octahedral complex of a metal ion $\mathrm{M}^{3+}$ with four monodentate ligands $\mathrm{L}_1, \mathrm{~L}_2, \mathrm{~L}_3$ and $\mathrm{L}_4$ absorb wavelength in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:
[2014]
(a) $\mathrm{L}_3<\mathrm{L}_2<\mathrm{L}_4<\mathrm{L}_1$
(b) $\mathrm{L}_1<\mathrm{L}_2<\mathrm{L}_4<\mathrm{L}_3$
(c) $\mathrm{L}_4<\mathrm{L}_3<\mathrm{L}_2<\mathrm{L}_1$
(d) $\mathrm{L}_1<\mathrm{L}_3<\mathrm{L}_2<\mathrm{L}_4$

Raghvendra Singh
Raghvendra Singh
Numerade Educator
07:22

Problem 180

The pair having same magnetic movement is
[2016]
(a) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ and $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(b) $\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ and $\left.\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(c) $\left[\mathrm{CoCl}_4\right]^{2-}$ and $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
(d) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ and $\left[\mathrm{CoCl}_4\right]^{2-}$

Maryam Riaz
Maryam Riaz
Numerade Educator
03:16

Problem 181

. Which of the following complexe shows optical isomerism
[2016]
(a) $\mathrm{Cis}\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(b) $\operatorname{trans}\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Cl}$
(c) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$
(d) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$

Maryam Riaz
Maryam Riaz
Numerade Educator