A Complete Resource Book in Chemistry for JEE Main

A.K. Singhal

Chapter 14

Chemistry of Representive Elements - all with Video Answers

Educators

Chapter Questions

Problem 1

Metals having ns $^{1}$ as the valence electronic configuration
(a) have a first ionization potential of more than $10 \mathrm{eV} /$ atom
(b) are highly electropositive
(c) are highly electronegative
(d) act as strong oxidizing reagents

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Problem 2

The oxidation state of sodium in sodium amalgam is
(a) $-1$
(b) $+1$
(c) $+2$
(d) 0

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Problem 3

Which of the following does not give flame colouration?
(a) $\mathrm{Mg}$
(b) $\mathrm{Ca}$
(c) $\mathrm{Sr}$
(d) $\mathrm{Ba}$

Shahina -

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Problem 4

Which of the following alkali metal ions has the lowest ionic mobility in aqueous solution?
(a) $\mathrm{Na}^{+}$
(b) $\mathrm{Li}^{+}$
(c) $\mathrm{Rb}^{+}$
(d) $\mathrm{Cs}^{+}$

Shahina -

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Problem 5

Which type of ion does the anhydrons mixture of KF and HF contain?
(a) $\mathrm{KH}^{+}, \mathrm{F}^{-}$
(b) $(\mathrm{KF})^{+}(\mathrm{HF})^{-}$
(c) $\mathrm{K}^{+}, \mathrm{H}^{+}, \mathrm{F}^{-}$
(d) $\mathrm{K}^{+}, \mathrm{HF}_{2}^{-}$

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Problem 6

What are the products formed when $\mathrm{Li}_{2} \mathrm{CO}_{3}$ undergoes decomposition?
(a) $\mathrm{LiO}_{2}+\mathrm{CO}$
(b) $\mathrm{Li}_{2} \mathrm{O}+\mathrm{CO}$
(c) $\mathrm{Li}_{2} \mathrm{O}_{2}+\mathrm{CO}$
(d) $\mathrm{Li}_{2} \mathrm{O}+\mathrm{CO}_{2}$

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Problem 7

Which among the following is most soluble in alcohol?
(a) $\mathrm{KClO}_{4}$
(b) $\mathrm{NaClO}_{4}$
(c) $\mathrm{CsClO}_{4}$
(d) $\mathrm{LiClO}_{4}$

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Problem 8

The metal that dissolves in liquid ammonia, giving a dark blue coloured solution is
(a) lead
(b) tin
(c) silver
(d) sodium

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Problem 9

The pair of elements that have similar chemical properties is
(a) beryllium and boron
(b) lithium and magnesium
(c) carbon and nitrogen
(d) aluminium and magnesium

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Problem 10

The relative thermal stabilities of alkali metal halides are such that
(a) $\mathrm{CsCl}>\mathrm{RbCl}>\mathrm{KCl}<\mathrm{NaCl}>\mathrm{LiCl}$
(b) $\mathrm{CsCl}>\mathrm{RbCl}<\mathrm{KCl}>\mathrm{NaCl}<\mathrm{LiCl}$
(c) $\mathrm{LiCl}>\mathrm{NaCl}>\mathrm{KCl}>\mathrm{RbCl}>\mathrm{CsCl}$
(d) $\mathrm{CsCl}>\mathrm{RbCl}>\mathrm{KCl}>\mathrm{NaCl}>\mathrm{LiCl}$

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Problem 11

Photoelectric effect is maximum in
(a) $\mathrm{K}$
(b) $\mathrm{Cs}$
(c) $\mathrm{Na}$
(d) $\mathrm{Li}$

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Problem 12

The ionic conductance of following cations in a given concentration is in the order
(a) $\mathrm{Li}^{+}>\mathrm{Na}^{+}<\mathrm{K}^{+}<\mathrm{Rb}^{+}$
(b) $\mathrm{Li}^{+}=\mathrm{Na}^{+}<\mathrm{K}^{+}<\mathrm{Rb}^{+}$
(c) $\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{K}^{+}>\mathrm{Rb}^{+}$
(d) $\mathrm{Li}^{+}<\mathrm{Na}^{+}<\mathrm{K}^{+}<\mathrm{Rb}^{+}$

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Problem 13

Alkali metals have high oxidation potential and hence, they behave as
(a) electrolytes
(b) Lewis bases
(c) oxidizing agents
(d) reducing agents

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Problem 14

Alkali metals present in their compounds are always
(a) monovalent
(b) bivalent
(c) zerovalent
(d) none of these

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Problem 15

An element $\mathrm{M}$ reacts with chlorine to form a compound $\mathrm{X}$. The bond angle in $\mathrm{X}$ is $120^{\circ}$. What is $\mathrm{M}$ ?
(a) $\bar{B}$
(b) $\mathrm{N}$
(c) $\mathrm{Be}$
(d) $\mathrm{Mg}$

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Problem 16

As the nuclear charge increases from neon to calcium, the orbital energies
(a) increase very slowly
(b) increase very rapidly
(c) fall
(d) increase

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Problem 17

Which of the following has the lowest melting point?
(a) $\mathrm{Cs}$
(b) $\mathrm{Na}$
(c) Li
(d) $\mathrm{K}$

Narayan Hari

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Problem 18

Which of the following has the least ionization potential?
(a) $\mathrm{He}$
(b) $\mathrm{Li}$
(c) $\mathrm{Zn}$
(d) $\mathrm{N}$

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Problem 19

As the alkaline earth metals (except Be) tend to lose their valence electrons readily, they act as
(a) bases
(b) strong reducing agents
(c) weak oxidizing agents
(d) weak reducing agents

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Problem 20

Which of the following has the maximum ionization energy?
(a) $\mathrm{Ca} \longrightarrow \mathrm{Ca}^{2+}+2 \mathrm{e}^{-}$
(b) $\mathrm{Mg} \longrightarrow \mathrm{Mg}^{2+}+2 \mathrm{e}^{-}$
(c) $\mathrm{Ba} \longrightarrow \mathrm{Ba}^{+}+\mathrm{e}^{-}$
(d) $\mathrm{Be} \longrightarrow \mathrm{Be}^{+}+\mathrm{e}^{-}$

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Problem 21

In view of their low ionization energies, the alkali metals are
(a) strong oxidizing agents
(b) weak oxidizing agents
(c) strong reducing agents
(d) weak reducing agents

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Problem 22

The increasing order of atomic radius for the elements $\mathrm{Na}, \mathrm{Rb}, \mathrm{K}$ and $\mathrm{Mg}$ is
(a) $\mathrm{Mg}<\mathrm{Na}<\mathrm{K}<\mathrm{Rb}$
(b) $\mathrm{Rb}<\mathrm{K}<\mathrm{Mg}<\mathrm{Na}$
(c) $\mathrm{Na}<\mathrm{K}<\mathrm{Mg}<\mathrm{Rb}$
(d) $\mathrm{Na}<\mathrm{Mg}<\mathrm{K}<\mathrm{Rb}$

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Problem 23

Lithium is the strongest reducing agent among alkali metals due to which of the following factors?
(a) hydration energy
(b) electron affinity
(c) lattice energy
(d) ionization energy

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Problem 24

The alkali metal that reacts with nitrogen directly to form nitride is
(a) $\mathrm{K}$
(b) $\mathrm{Na}$
(c) Li
(d) $\mathrm{Rb}$

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Problem 25

Amongst the trihalides of nitrogen, which one is the least basic?
(a) $\mathrm{NF}_{3}$
(b) $\mathrm{NCl}_{3}$
(c) $\mathrm{NBr}_{3}$
(d) $\mathrm{NI}_{3}$

Alkendra Singh

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Problem 26

Which one of the following arrangement is in the order of increasing density?
(a) $\mathrm{Na}<\mathrm{K}<\mathrm{Li}$
(b) $\mathrm{Li}<\mathrm{K}<\mathrm{Na}$
(c) $\mathrm{K}<\mathrm{Li}<\mathrm{Na}$
(d) $\mathrm{Li}<\mathrm{Na}<\mathrm{K}$

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Problem 27

The decreasing order of solubility of alkaline earth metal hydroxides $\left[\mathrm{M}(\mathrm{OH})_{2}\right]$ is given as
(a) $\mathrm{Ba}>\mathrm{Sr}>\mathrm{Ca}>\mathrm{Mg}>\mathrm{Be}$
(b) $\mathrm{Be}<\mathrm{Mg}<\mathrm{Ca}<\mathrm{Sr}<\mathrm{Ba}$
(c) $\mathrm{Be}=\mathrm{Mg}>\mathrm{Ca}>\mathrm{Sr}>\mathrm{Ba}$
(d) $\mathrm{Mg}<\mathrm{Be}<\mathrm{Ca}<\mathrm{Ba}<\mathrm{Sr}$

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Problem 28

The electronic configuration of group III elements is
(a) $\mathrm{ns}^{1} \mathrm{np}^{2}$
(b) $\mathrm{ns}^{\mathrm{t}} \mathrm{np}^{3}$
(c) $\mathrm{ns}^{2} \mathrm{np}^{1}$
(d) $\mathrm{ns}^{2} \mathrm{np}^{2}$

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Problem 29

Which of the following is the strongest Lewis acid?
(a) $\mathrm{BBr}_{3}$
(b) $\mathrm{BCl}_{3}$
(c) $\mathrm{BI}_{3}$
(d) $\mathrm{BF}_{3}$

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Problem 30

Which of the following ions does not exist as octahedral aqua ions?
(a) $\mathrm{Al}$
(b) Ga
(c) $\mathrm{Tl}$
(d) $\mathrm{B}$

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Problem 31

Which one of the following is not a Lewis acid?
(a) $\mathrm{C}_{2} \mathrm{H}_{4}$
(b) $\mathrm{FeCl}_{3}$
(c) $\mathrm{BF}_{3}^{2}$
(d) $\mathrm{SiF}_{4}$

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Problem 32

Ga is below Al in the periodic table, but atomic radius of Ga is less than Al. It is because of
(a) lanthanoid contraction
(b) greater screening effect
(c) inert pair effect
(d) none of these

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Problem 33

The thermal stability order for group 14 halides is
(a) $\mathrm{Sn} \mathrm{X}_{4}>\mathrm{GeX}_{4}>\mathrm{SiX}_{4}>\mathrm{CX}_{4}$
(b) $\mathrm{CX}_{4}^{4}>\mathrm{SiX}_{4}>\mathrm{GeX}_{4}>\mathrm{Sn} \mathrm{X}_{4}$
(c) $\mathrm{SiX}_{4}>\mathrm{CX}_{4}^{4}>\mathrm{GeX}_{4}^{4}>\operatorname{Sn} \mathrm{X}_{4}^{4}$
(d) $\mathrm{CX}_{4}^{\top}>\mathrm{Sn} \mathrm{X}_{4}>\mathrm{GeX}_{4}>\mathrm{SiX}_{4}$

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Problem 34

Which of the following is a false statement?
(a) boron hydrides are formed when dil. HCl reacts with $\mathrm{Mg}_{3} \mathrm{~B}_{2}$
(b) all the B-H bond distances in $\mathrm{B}_{2} \mathrm{H}_{6}$ are equal
(c) $\mathrm{BH}_{3}$ is not a stable compound
(d) the boron hydrides are readily hydrolyzed

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Problem 35

Elements of group 14
(a) form $\mathrm{M}^{4}$ and $\mathrm{M}^{4}$ ions
(b) form $\mathrm{M}^{4+}$ ions
(c) exhibit oxidation state of $+4$
(d) exhibit oxidation state of $+4$ and $+2$

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Problem 36

Maximum ability of catenation is shown by
(a) sulphur
(b) nitrogen
(c) oxygen
(d) carbon

Narayan Hari

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Problem 37

The type of bonding present in tetravalent compounds of group 14 elements is
(a) zero
(b) $-2$
(c) $+2$
(d) $-4$

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Problem 38

The shape of tetrahalides of group 14 elements is
(a) tetrahedral
(b) octahedral
(c) trigonal bipyramidal
(d) square planar

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Problem 39

The C-X bond energy order for carbon tetrahalide is
(a) $\mathrm{CI}_{4}>\mathrm{CBr}_{4}>\mathrm{CCl}_{4}>\mathrm{CF}_{4}$
(b) $\mathrm{CCl}_{4}>\mathrm{CBr}_{4}>\mathrm{CI}_{4}>\mathrm{CF}_{4}$
(c) $\mathrm{CF}_{4}>\mathrm{CCl}_{4}>\mathrm{CBr}_{4}>\mathrm{CI}_{4}$
(d) $\mathrm{CCl}_{4}>\mathrm{CI}_{4}>\mathrm{CBr}_{4}>\mathrm{CF}_{4}$

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Problem 40

Which of the following has the highest first ionization potential?
(a) $\mathrm{P}$
(b) $\mathrm{K}$
(c) $\mathrm{Al}$
(d) Si

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Problem 41

Which of the following is the most explosive?
(a) $\mathrm{NCl}_{3}$
(b) $\mathrm{PCl}_{3}$
(c) $\mathrm{AsCl}$,
(d) All

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Problem 42

The strongest base is
(a) $\mathrm{NH}_{3}$
(b) $\mathrm{PH}_{3}$
(c) $\mathrm{AsH}_{3}$
(d) $\mathrm{SbH}_{3}$

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Problem 43

Which of the following is the most basic oxide?
(a) $\mathrm{Al}_{2} \mathrm{O}_{3}$
(b) $\mathrm{SeO}_{2}$
(c) $\mathrm{Bi}_{2} \mathrm{O}_{3}$
(d) $\mathrm{Sb}_{2} \mathrm{O}_{3}$

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Problem 44

Which of the following species has the highest dipole moment?
(a) $\mathrm{PH}_{3}$
(b) $\mathrm{NH}_{3}$
(c) $\mathrm{SbH}_{3}$
(d) $\mathrm{AsH}_{3}$

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Problem 45

Which of the following oxides will be the least acidic?
(a) $\mathrm{As}_{4} \mathrm{O}_{10}$
(b) $\mathrm{P}_{4} \mathrm{O}_{6}$
(c) $\mathrm{P}_{4} \mathrm{O}_{10}$
(d) $\mathrm{As}_{4} \mathrm{O}_{6}$

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Problem 46

Amongst $\mathrm{H}_{2} \mathrm{O}, \mathrm{H}_{2} \mathrm{~S}, \mathrm{H}_{2} \mathrm{Se}$ and $\mathrm{H}_{2}$ Te the one with the
highest boiling point is
(a) $\mathrm{H}_{2} \mathrm{O}$ because of hydrogen bonding
(b) $\mathrm{H}_{2} \mathrm{Te}$ because of higher molecular weight
(c) H_{\{} S e ~ b e c a u s e ~ o f ~ l o w e r ~ m o l e c u l a r ~ w e i g h t ~
(d) $\mathrm{H}_{2} \mathrm{~S}$ because of hydrogen bonding

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Problem 47

The ionic mobility of alkali metal ions in aqueous solution is maximum for
(a) $\mathrm{K}^{+}$
(b) $\mathrm{Rb}^{+}$
(c) $\mathrm{Li}^{+}$
(d) $\mathrm{Na}^{+}$

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Problem 48

Which one has the lowest boiling point?
(a) $\mathrm{NH}_{3}$
(b) $\mathrm{SbH}_{3}$
(c) $\mathrm{AsCl}_{3}$
(d) $\mathrm{PH}_{3}$

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Problem 49

The number of oxygen atoms bonded to each phosphorous atom in $\mathrm{P}_{4} \mathrm{O}_{10}$ is
(a) 6
(b) 5
(c) 4
(d) 3

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Problem 50

dit-pr bonding is shown in
(a) $\mathrm{P}_{2} \mathrm{O}_{3}, \mathrm{P}_{2} \mathrm{O}_{5}, \mathrm{PO}_{4}{ }^{3}-$
(b) $\mathrm{CO}, \mathrm{NO}, \mathrm{CO}_{2}, \mathrm{NO}_{2}$
(c) $\mathrm{NH}_{3}, \mathrm{PH}_{3}, \mathrm{BiH}_{3}$
(d) $\mathrm{NO}_{3}^{-}, \mathrm{NO}_{2}-\mathrm{N}^{3-}, \mathrm{CN}^{-}$

Narayan Hari

Numerade Educator

Problem 51

Which of the following fluorides does not exist?
(a) $\mathrm{PF}_{5}$
(b) $\mathrm{SbF}$
(c) $\mathrm{NF}_{5}$
(d) $\mathrm{AsF}_{5}$

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Problem 52

Which one of the following hydrides is most acidic?
(a) $\mathrm{H}_{2} \mathrm{Te}$
(b) $\mathrm{H}_{2} \mathrm{~S}$
(c) $\mathrm{H}_{2} \mathrm{O}$
(d) $\mathrm{H}_{2} \mathrm{Se}$

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Problem 53

Which of the following has the most acidiccharacter?
(a) HF
(b) $\mathrm{HCl}$
(c) $\mathrm{HBr}$
(d) HI

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Problem 54

Which one of the sixth group elements has the highest catenation power?
(a) $\mathrm{O}$
(b) $\mathrm{S}$
(c) $\mathrm{Se}$
(d) $\mathrm{Te}$

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Problem 55

Which of the following has the lowest bond angle?
(a) $\mathrm{H}_{2} \mathrm{O}$
(b) $\mathrm{CH}_{4}$
(c) $\mathrm{H}_{2} \mathrm{~S}$
(d) $\mathrm{NH}_{3}$

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Problem 56

Which one of the following elements does not form the compound, $\mathrm{M}_{4} \mathrm{O}_{10}(\mathrm{M}=$ element $) ?$
(a) As
(b) Bi
(c) $\mathrm{Sb}$
(d) $\mathrm{Pb}$

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Problem 57

Which of the following bonds will be mostpolar?
(a) $\mathrm{O}-\mathrm{F}$
(b) $\mathrm{N}-\mathrm{F}$
(c) $\mathrm{N}-\mathrm{N}$
(d) $\mathrm{N}-\mathrm{Cl}$

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Problem 58

Which of the following sets has the strongest tendency to form anions?
(a) $\mathrm{V}, \mathrm{Cr}, \mathrm{Mn}$
(b) $\mathrm{N}, \mathrm{O}, \mathrm{F}$
(c) Ga, In, Tl
(d) $\mathrm{Na}, \mathrm{Mg}, \mathrm{Al}$

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Problem 59

Which one of the following statements is correct with respect to the basic character?
(a) $\mathrm{PH}_{3}=\mathrm{NH}_{3}$
(b) $\mathrm{PH}_{3}>\mathrm{P}\left(\mathrm{CH}_{3}\right)_{3}$
(c) $\mathrm{P}\left(\mathrm{CH}_{3}\right)_{3}>\mathrm{PH}_{3}$
(d) $\mathrm{PH}_{3}>\mathrm{NH}_{3}$

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Problem 60

The correct order for decreasing ionic nature of lead dihalides is
(a) $\mathrm{PbF}_{2}>\mathrm{PbBr}_{2}>\mathrm{PbCl}_{2}>\mathrm{PbI}_{2}$
(b) $\mathrm{PbF}_{2}>\mathrm{PbI}_{2}>\mathrm{PbBr}_{2}>\mathrm{PbCl}_{2}^{2}$
(c) $\mathrm{PbI}_{2}>\mathrm{PbBr}_{2}>\mathrm{PbCl}_{2}>\mathrm{PbF}_{2}$
(d) $\mathrm{PbF}_{2}>\mathrm{PbCl}_{2}>\mathrm{PbBr}_{2}>\mathrm{PbI}_{2}$

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Problem 61

Which of the following has correct increasing order of hydrolysis?
(a) $\mathrm{PCl}_{5}<\mathrm{SiCl}_{2}<\mathrm{MgCl}_{2}<\mathrm{AlCl}_{3}<\mathrm{CCl}_{4}$
(b) $\mathrm{CCl}_{4}<\mathrm{MgCl}_{2}<\mathrm{AlCl}_{3}<\mathrm{SiCl}_{4}<\mathrm{PCl}_{5}$
(c) $\mathrm{PCl}_{5}<\mathrm{MgCl}_{2}<\mathrm{AlCl}_{3}<\mathrm{SiCl}_{4}<\mathrm{CCl}_{4}$
(d) $\mathrm{CCl}_{4}<\mathrm{SiCl}_{4}<\mathrm{AlCl}_{3}<\mathrm{MgCl}_{2}<\mathrm{PCl}_{5}^{4}$

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Problem 62

Which of the following has the least bond energy?
(a) $\mathrm{H}_{2}$
(b) $\mathrm{F}_{2}$
(c) $\mathrm{O}_{2}$
(d) $\mathrm{N}_{2}$

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Problem 63

Which of the following has the highest electronegativity?
(a) $\mathrm{K}$
(b) $\mathrm{B}$
(c) $\mathrm{Cl}$
(d) $\mathrm{Na}$

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Problem 64

Which of the following is the strongest oxidizing agent?
(a) $\mathrm{F}_{2}$
(b) $\mathrm{Cl}_{2}$
(c) $\mathrm{Br}_{2}$
(d) $\mathrm{I}_{2}$

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Problem 65

Which of the following is the correct relation with regard to the electron afinity of halogen?
(a) $\mathrm{F}>\mathrm{Cl}$
(b) $\mathrm{F}>\mathrm{I}$
(c) $\mathrm{Br}>\mathrm{F}$
(d) $\mathrm{Br}>\mathrm{Cl}$

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Problem 66

The configuration of inert gas with smallest size and highest IE is
(a) $1 \mathrm{~s}^{2}$
(b) $1 s^{2} 2 s^{2} 2 p^{6}$
(c) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{5}$
(d) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6}$

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Problem 67

Noble gases can act as
(a) reducing agents
(b) oxidizing agents
(c) both of these
(d) none of these

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Problem 68

Noble gases are a group of elements which exhibit very
(a) high chemical activity
(b) less diamagnetic property
(c) high electronegativity
(d) low chemical activity

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Problem 69

Noble gases are sparingly soluble in water, owing to
(a) hydrogen bonding
(b) dipole-dipole interactions
(c) dipole-induced dipole interactions
(d) induced dipole-instantaneous dipole interactions

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Problem 70

The increase in boiling points of noble gases from He to Xe is due to the
(a) increase in atomic volume
(b) increase in electron affinity
(c) increase in polarizability
(d) decrease in ionization energy

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Problem 71

The van der Waals forces in halogen decrease in the order
(a) $\mathrm{I}_{2}>\mathrm{Br}_{2}>\mathrm{Cl}_{2}>\mathrm{F}_{2}$
(b) $\mathrm{F}_{2}>\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{I}_{2}$
(c) $\mathrm{I}_{2}>\mathrm{F}_{2}>\mathrm{Br}_{2}>\mathrm{Cl}_{2}$
(d) $\mathrm{Cl}_{2}>\mathrm{I}_{2}>\mathrm{Br}_{2}>\mathrm{F}_{2}^{2}$

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Problem 72

Which of the following are arranged in correct increasing order of solubilities?
(a) $\mathrm{KHCO}_{3}<\mathrm{NaHCO}_{3}<\mathrm{CaCO}_{3}$
(b) $\mathrm{CaCO}_{3}<\mathrm{KHCO}_{3}<\mathrm{NaHCO}_{3}$
(c) $\mathrm{CaCO}_{3}<\mathrm{NaHCO}_{3}<\mathrm{KHCO}_{3}$
(d) $\mathrm{NaHCO}_{3}<\mathrm{KHCO}_{3}<\mathrm{CaCO}_{3}$

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Problem 73

The halogen which oxidizes water to $\mathrm{O}_{2}$ exothermally is
(a) $\mathrm{I}_{2}$
(b) $\mathrm{Br}_{2}$
(c) $\mathrm{Cl}_{2}$
(d) $\mathrm{F}_{2}$

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Problem 74

Which of the following oxides is solid in nature?
(a) $\mathrm{SnO}_{2}$
(b) $\mathrm{PbO}_{2}$
(c) $\mathrm{SiO}_{2}$
(d) all of these

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Problem 75

In Vth group, which element has highest boiling point value?
(a) Bi
(b) Sb
(c) As
(d) $\mathrm{P}$

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Problem 76

Which of the following is arranged in order of increasing thermal stability?
(a) $\mathrm{BaCO}_{3}<\mathrm{SrCO}_{3}<\mathrm{CaCO}_{3}<\mathrm{MgCO}_{3}$
(b) $\mathrm{CaCO}_{3}<\mathrm{MgCO}_{3}<\mathrm{BaCO}_{3}<\mathrm{SrCO}_{3}$
(c) $\mathrm{MgCO}_{3}<\mathrm{CaCO}_{3}<\mathrm{SrCO}_{3}<\mathrm{BaCO}_{3}$
(d) $\mathrm{MgCO}_{3}<\mathrm{SrCO}_{3}<\mathrm{CaCO}_{3}<\mathrm{BaCO}_{3}^{3}$

Narayan Hari

Numerade Educator

Problem 77

On dissolving moderate amount of sodium metal in liquid $\mathrm{NH}_{3}$ at low temperature, which one of the following does not occur?
(a) Na+ ions are formed in the solution
(b) liquid $\mathrm{NH}_{3}$ solution remains diamagnetic
(c) liquid $\mathrm{NH}_{3}$ solution becomes a good conductor of electricity
(d) blue coloured solution is obtained

Narayan Hari

Numerade Educator

Problem 78

Which of the following is arranged in order of decreasing solubility in water?
(a) $\mathrm{CaSO}_{4}>\mathrm{BaSO}_{4}>\mathrm{BeSO}_{4}>\mathrm{MgSO}_{4}>\mathrm{SrSO}_{4}$
(b) $\mathrm{BeSO}_{4}>\mathrm{MgSO}_{4}>\mathrm{CaSO}_{4}>\mathrm{SrSO}_{4}>\mathrm{BaSO}_{4}$
(c) $\mathrm{BaSO}_{4}>\mathrm{SrSO}_{4}>\mathrm{CaSO}_{4}>\mathrm{MgSO}_{4}>\mathrm{BeSO}_{4}$
(d) $\mathrm{BeSO}_{4}>\mathrm{CaSO}_{4}>\mathrm{MgSO}_{4}>\mathrm{SrSO}_{4}>\mathrm{BaSO}_{4}$

Narayan Hari

Numerade Educator

Problem 79

An element (A) occurs in a short period having the configuration $\mathrm{ns}^{2} \mathrm{np}^{1}$. The formula and nature of its oxide is
(a) $\mathrm{AO}_{3}$, acidic
(b) $\mathrm{A}_{2} \mathrm{O}_{3}$, amphoteric
(c) $\mathrm{AO}_{3}$, basic
(d) $\mathrm{A}_{2} \mathrm{O}_{3}$, basic

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Problem 80

In compounds of the type $\mathrm{ECl}_{3}$, where $\mathrm{E}=\mathrm{B}, \mathrm{P}$, As or Bi, the angle $\mathrm{Cl}-\mathrm{E}-\mathrm{Cl}$ for different $\mathrm{E}$ are in the order
(a) $\mathrm{B}>\mathrm{P}=\mathrm{As}=\mathrm{Bi}$
(b) $\mathrm{B}>\mathrm{P}>\mathrm{As}>\mathrm{Bi}$
(c) $\mathrm{B}<\mathrm{P}=\mathrm{As}=\mathrm{Bi}$
(d) $\mathrm{B}<\mathrm{P}<\mathrm{As}<\mathrm{Bi}$

Narayan Hari

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Problem 81

The catenation tendency of $\mathrm{C}, \mathrm{Si}$ and Ge is in the order $\mathrm{Ge}<\mathrm{Si}<\mathrm{C}$. The bond energies (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) of $\mathrm{C}-\mathrm{C}$,
Si-Si and Ge-Ge bonds, respectively are
(a) $348,180,167$
(b) $180,167,348$
(c) $348,167,180$
(d) $167,180,348$

Narayan Hari

Numerade Educator

Problem 82

Which one of the following is correct about stability of the given ions?
(a) $\mathrm{Sn}^{4+}>\mathrm{Sn}^{2+}$
(b) $\mathrm{Pb}^{4+}>\mathrm{Pb}^{2+}$
(c) $\mathrm{Pb}^{2+}>\mathrm{Pb}^{4+}$
(d) $\mathrm{Si}^{2+}>\mathrm{Si}^{4+}$

Narayan Hari

Numerade Educator

Problem 83

The correct order of solubility of fluorides of alkaline earth metals is
(a) $\mathrm{BeF}_{2}>\mathrm{MgF}_{2}>\mathrm{CaF}_{2}>\mathrm{SrF}_{2}>\mathrm{BaF}_{2}$
(b) $\mathrm{MgF}_{2}>\mathrm{BaF}_{2}>\mathrm{SrF}_{2}>\mathrm{CaF}_{2}>\mathrm{BeF}_{2}$
(c) $\mathrm{BaF}_{2}>\mathrm{SrF}_{2}>\mathrm{CaF}_{2}>\mathrm{MgF}_{2}>\mathrm{BeF}_{2}$
(d) $\mathrm{BeF}_{2}^{2}>\mathrm{Mg}^{2} \mathrm{~F}_{2}>\mathrm{SrF}_{2}^{2}>\mathrm{BaF}_{2}^{2}>\mathrm{CaF}_{2}^{2}$

Narayan Hari

Numerade Educator

Problem 84

In group IV A or 14 of the extended form of the periodic table, with the increase in atomic number, the oxidizing power of tetravalent species increases in the order
(a) $\mathrm{Ge}>\mathrm{Sn}>\mathrm{Pb}$
(b) $\mathrm{Pb}>\mathrm{Sn}>\mathrm{Ge}$
(c) $\mathrm{Pb}>\mathrm{Ge}>\mathrm{Sn}$
(d) $\mathrm{Ge}>\mathrm{Pb}>\mathrm{Sn}$

Narayan Hari

Numerade Educator

Problem 85

Which element-element bond has the highest bond energy?
(a) $\mathrm{SiF}_{4}$
(b) Si-Si
(c) $\mathrm{Sn}-\mathrm{Sn}$
(d) Ge-Ge

Narayan Hari

Numerade Educator

Problem 86

The correct order of stability is
(a) $\mathrm{SnF}_{2}>\mathrm{PbF}_{2}>\mathrm{GeF}_{2}$
(b) $\mathrm{GeF}_{2}>\mathrm{SnF}_{2}>\mathrm{PbF}_{2}^{2}$
(c) $\mathrm{GeF}_{2}>\mathrm{PbF}_{2}^{2}>\mathrm{SnF}_{2}$
(d) $\mathrm{PbF}_{2}>\mathrm{SnF}_{2}>\mathrm{GeF}_{2}$

Narayan Hari

Numerade Educator

Problem 87

The stability of the following alkali metal chlorides follows the order
(a) $\mathrm{CsCl}>\mathrm{KCl}>\mathrm{NaCl}>\mathrm{LiCl}$
(b) $\mathrm{NaCl}>\mathrm{KCl}>\mathrm{LiCl}>\mathrm{CsCl}$
(c) $\mathrm{KCl}>\mathrm{CsCl}>\mathrm{NaCl}>\mathrm{LiCl}$
(d) $\mathrm{LiCl}>\mathrm{KCl}>\mathrm{NaCl}>\mathrm{CsCl}$

Narayan Hari

Numerade Educator

Problem 88

What is the order of basic nature of hydrides of group $\mathrm{V}$ elements?
(a) $\mathrm{AsH}_{3}>\mathrm{SbH}_{3}>\mathrm{PH}_{3}>\mathrm{NH}_{3}$
(b) $\mathrm{NH}_{3}>\mathrm{SbH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}$
(c) $\mathrm{NH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}>\mathrm{SbH}_{3}$
(d) $\mathrm{PH}_{3}>\mathrm{NH}_{3}>\mathrm{SbH}_{3}>\mathrm{AsH}_{3}$

Narayan Hari

Numerade Educator

Problem 89

Select incorrect statement about hydrides of group 15 elements
(a) the central atom in the hydride is sp $^{2}$ hybridized
(b) $\mathrm{NH}_{3}$ readily form $\mathrm{NH}_{4}^{+}$salts with $\mathrm{H}^{+} ; \mathrm{PH}_{4}^{+}$salts are formed with $\mathrm{H}^{+}$under anhydrous condition
(c) the tetrahedron is distorted due to repulsion between the lone pair of electrons and the bond pairs
(d) the bond energy of the M-H bond decreases from $\mathrm{NH}_{3}$ to $\mathrm{BiH}_{3}$ because of increase in the size of the element.

Narayan Hari

Numerade Educator

Problem 90

Which of the following is arranged in the increasing order of enthalpy of vaporization?
(a) $\mathrm{PH}_{3}, \mathrm{AsH}_{3}, \mathrm{NH}_{3}$
(b) $\mathrm{AsH}_{3}, \mathrm{PH}_{3}, \mathrm{NH}_{3}$
(c) $\mathrm{NH}_{3}, \mathrm{AsH}_{3}, \mathrm{PH}_{3}$
(d) $\mathrm{NH}_{3}, \mathrm{PH}_{3}, \mathrm{AsH}_{3}$

Narayan Hari

Numerade Educator

Problem 91

The correct order of the solubility of alkaline earth metal chlorides in water is
(a) $\mathrm{BaCl}_{2}>\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}>\mathrm{BeCl}_{2}>\mathrm{SrCl}_{2}$
(b) $\mathrm{BeCl}_{2}>\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{SrCl}_{2}^{2}>\mathrm{BaCl}_{2}$
(c) $\mathrm{MgCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{BeCl}_{2}^{2}>\mathrm{BaCl}_{2}>\mathrm{SrCl}_{2}^{2}$
(d) $\mathrm{BaCl}_{2}^{2}>\mathrm{SrCl}_{2}>\mathrm{CaCl}_{2}^{2}>\mathrm{MgCl}_{2}>\mathrm{BeCl}_{2}^{2}$

Narayan Hari

Numerade Educator

Problem 92

Both $\mathrm{NF}_{3}$ and $\mathrm{NCl}_{3}$ are covalent but they differ in the extent of hydrolysis because
(a) Cl can expand its octet by using d-orbitals
(b) electronegativity of $\mathrm{F}$ is greater than that of $\mathrm{Cl}$
(c) dipole moment of $\mathrm{NF}_{3}$ is greater than that of $\mathrm{NCl}_{3}$
(d) $\mathrm{NF}_{3}$ is more stable than $\mathrm{NCl}_{3}$ and hydrolysis product of $\mathrm{NF}_{3}$, HFO does not exist.

Narayan Hari

Numerade Educator

Problem 93

$\mathrm{N}$ forms $\mathrm{NCl}_{3}$ whereas $\mathrm{P}$ can form both $\mathrm{PCl}_{3}$ and $\mathrm{PCl}_{5}$. Why?
(a) $\mathrm{N}$ atoms are larger than $\mathrm{P}$ atoms in size
(b) P has low lying $3 \mathrm{~d}$ orbitals, which can be used for bonding but $\mathrm{N}$ does not have $3 \mathrm{~d}$ orbitals in its valence shell
(c) $\mathrm{P}$ is more reactive towards $\mathrm{Cl}$ than $\mathrm{N}$
(d) none of these

Shahina -

Numerade Educator

Problem 94

Maximum number of covalent bonds formed by $\mathrm{N}$ and $\mathrm{P}$ respectively are
(a) 3,6
(b) 4,6
(c) 3,5
(d) 4,5

Shahina -

Numerade Educator

Problem 95

Thermal stability of $\mathrm{BaCO}_{3}, \mathrm{CaCO}_{3}$ and $\mathrm{MgCO}_{3}$ is
(a) $\mathrm{BaCO}_{3}>\mathrm{CaCO}_{3}>\mathrm{MgCO}_{3}$
(b) $\mathrm{BaCO}_{3}>\mathrm{MgCO}_{3}>\mathrm{CaCO}_{3}$
(c) $\mathrm{MgCO}_{3}>\mathrm{CaCO}_{3}>\mathrm{BaCO}_{3}$
(d) $\mathrm{CaCO}_{3}>\mathrm{MgCO}_{3}>\mathrm{BaCO}_{3}$

Shahina -

Numerade Educator

Problem 96

The oxidation states of sulphur in the anions $\mathrm{SO}_{3}^{2-}$, $\mathrm{S}_{2} \mathrm{O}_{4}^{2-}$ and $\mathrm{S}_{2} \mathrm{O}_{6}^{2-}$ follow the order
(a) $\mathrm{S}_{2} \mathrm{O}_{6}^{2-}<\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{SO}_{3}^{2-}$
(b) $\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{S}_{2} \mathrm{O}_{6}^{2-}<\mathrm{SO}_{3}^{2-}$
(c) $\mathrm{SO}_{3}^{2-}<\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{S}_{2} \mathrm{O}_{6}^{2-}$
(d) $\mathrm{S}_{2} \mathrm{O}_{4}^{2-}<\mathrm{SO}_{3}^{2-}<\mathrm{S}_{2} \mathrm{O}_{6}^{2-}$

Shahina -

Numerade Educator

Problem 97

In case of the oxygen family (group 16)
(a) the tendency for catenation decreases markedly as we go down the group
(b) maximum coordination of oxygen is four due to lack of d orbital, but that of other elements is six due to presence of d orbitals
(c) the tendency to form multiple bonds with $\mathrm{C}, \mathrm{N}$ and $O$ decreases as going down the group from $S$ to Te
(d) all are correct

Shahina -

Numerade Educator

Problem 98

Which one of the following sequence is correct with reference to the oxidation number of iodine?
(a) $\mathrm{HI}<\mathrm{I}_{2}<\mathrm{ICl}<\mathrm{HIO}_{4}$
(b) $\mathrm{I}_{2}<\mathrm{HI}<\mathrm{ICl}<\mathrm{HIO}_{4}^{7}$
(c) $\mathrm{HIO}_{4}<\mathrm{ICl}<\mathrm{I}_{2}<\mathrm{HI}$
(d) $\mathrm{I}_{2}<\mathrm{ICl}<\mathrm{HI}<\mathrm{HIO}_{4}$

Shahina -

Numerade Educator

Problem 99

The correct order of hydration energy of alkaline earth metal ion is
(a) $\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}>\mathrm{Ba}^{2+}>\mathrm{Ca}^{2+}>\mathrm{Sr}^{2+}$
(b) $\mathrm{Be}^{2+}>\mathrm{Mg}^{2+}>\mathrm{Ca}^{2+}>\mathrm{Sr}^{2+}>\mathrm{Ba}^{2+}$
(c) $\mathrm{Ba}^{2+}>\mathrm{Be}^{2+}>\mathrm{Ca}^{2+}>\mathrm{Mg}^{2+}<\mathrm{Sr}^{2+}$
(d) $\mathrm{Be}^{2+}>\mathrm{Ca}^{2+}>\mathrm{Sr}^{2+}>\mathrm{Ba}^{2+}>\mathrm{Mg}^{2+}$

Shahina -

Numerade Educator

Problem 100

Bond dissociation energies of HF, HCl, HBr follows the order $\ldots \ldots .$
(a) $\mathrm{HBr}>\mathrm{HCl}>\mathrm{HF}$
(b) $\mathrm{HCl}>\mathrm{HBr}>\mathrm{HF}$
(c) $\mathrm{HF}>\mathrm{HBr}>\mathrm{HCl}$
(d) $\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}$

Shahina -

Numerade Educator

Problem 101

The correct order of acidic strength is
(a) $\mathrm{Cl}_{2} \mathrm{O}_{7}>\mathrm{SO}_{2}>\mathrm{P}_{4} \mathrm{O}_{10}$
(b) $\mathrm{CO}_{2}>\mathrm{N}_{2} \mathrm{O}_{5}>\mathrm{SO}_{3}$
(c) $\mathrm{Na}_{2} \mathrm{O}>\mathrm{MgO}>\mathrm{Al}_{2} \mathrm{O}_{3}$
(d) $\mathrm{K}_{2} \mathrm{O}>\mathrm{CaO}>\mathrm{Mg} \mathrm{O}$

Shahina -

Numerade Educator

Problem 102

The correct order of van der Waals radius of F, Cl and $\mathrm{Br}$ is
(a) $\mathrm{Cl}>\mathrm{F}>\mathrm{Br}$
(b) $\mathrm{Br}>\mathrm{Cl}>\mathrm{F}$
(c) $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}$
(d) $\mathrm{Br}>\mathrm{F}>\mathrm{Cl}$

Shahina -

Numerade Educator

Problem 103

Among the $\mathrm{C}-\mathrm{X}$ bond (where $\mathrm{X}=\mathrm{Cl}, \mathrm{Br}, \mathrm{I})$ the correct bond energy order is
(a) $\mathrm{C}-\mathrm{I}>\mathrm{C}-\mathrm{Cl}>\mathrm{C}-\mathrm{Br}$
(b) $\mathrm{C}-\mathrm{Cl}>\mathrm{C}-\mathrm{Br}>\mathrm{C}-\mathrm{I}$
(c) $\mathrm{C}-\mathrm{Br}>\mathrm{C}-\mathrm{Cl}>\mathrm{C}-\mathrm{I}$
(d) $\mathrm{C}-\mathrm{Cl}>\mathrm{C}-\mathrm{I}>\mathrm{C}-\mathrm{Br}$

Shahina -

Numerade Educator

Problem 104

When water is allowed to freeze in the presence of Ar, $\mathrm{Kr}$ or Xe under pressure, then
(a) atoms noble gas (G) trapped in the crystal lattice of ice gives clathrates corresponding to the composition 8G. $26 \mathrm{H}_{2} \mathrm{O}$
(b) these are called noble gas hydrates
(c) both are correct
(d) all are incorrect

Shahina -

Numerade Educator

Problem 105

Which one of the following is the correct order for the bond energies of halogen molecules?
(a) $\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{I}_{2}$
(b) $\mathrm{Br}_{2}>\mathrm{Cl}_{2}>\mathrm{I}_{2}$
(c) $\mathrm{I}_{2}>\mathrm{Cl}_{2}>\mathrm{Br}_{2}$
(d) $\mathrm{I}_{2}>\mathrm{Br}_{2}>\mathrm{Cl}_{2}$

Shahina -

Numerade Educator

Problem 106

Noble gases do not react with other elements because
(a) completely paired up electrons lead to stable electronic configuration
(b) the size of their atoms is very small
(c) they are found in abundance
(d) they are monoatomic

Shahina -

Numerade Educator

Problem 107

The magnitude of enthalpy for formation of alkali metal halides decreases in the order
(a) fluoride $>$ chloride $>$ iodide $>$ bromide
(b) iodide $>$ bromide $>$ chloride $>$ fluoride
(c) fluoride $>$ chloride $>$ bromide $>$ iodide
(d) bromide $>$ iodide $>$ fluoride $>$ chloride

Narayan Hari

Numerade Educator

Problem 108

The ease of liquefaction of noble gases increases in the order
(a) $\mathrm{Ar}>\mathrm{Kr}>\mathrm{Xe}>\mathrm{Ne}>\mathrm{He}$
(b) $\mathrm{Xe}>\mathrm{Kr}>\mathrm{Ne}>\mathrm{Ar}>\mathrm{He}$
(c) $\mathrm{Kr}>\mathrm{Xe}>\mathrm{He}>\mathrm{Ne}>\mathrm{Ar}$
(d) $\mathrm{He}>\mathrm{Ne}>\mathrm{Ar}>\mathrm{Kr}>\mathrm{Xe}$

Shahina -

Numerade Educator

Problem 109

The elements which occupy the peaks of ionization energy curve are
(a) $\mathrm{Cl}, \mathrm{Br}, \mathrm{I}, \mathrm{F}$
(b) $\mathrm{Na}, \mathrm{K}, \mathrm{Rb}, \mathrm{Cs}$
(c) $\mathrm{Na}, \mathrm{Mg}, \mathrm{Cl}, \mathrm{I}$
(d) $\mathrm{He}, \mathrm{Ne}, \mathrm{Ar}, \mathrm{Kr}$

Shahina -

Numerade Educator

Problem 110

Which of the following is arranged in order of increasing melting point?
(a) $\mathrm{Be}<\mathrm{Ca}<\mathrm{Sr}<\mathrm{Mg}$
(b) $\mathrm{Sr}<\mathrm{Mg}<\mathrm{Be}<\mathrm{Ca}$
(c) $\mathrm{Ca}<\mathrm{Be}<\mathrm{Mg}<\mathrm{Sr}$
(d) $\mathrm{Mg}<\mathrm{Sr}<\mathrm{Ca}<\mathrm{Be}$

Shahina -

Numerade Educator

Problem 111

The oxidation state of boron family shows which of the following trend for stable $+1$ oxidation state?
(a) $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}(+1$ O.S. stability increases)
(b) $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ (stability of $+3$ oxidation states)
(c) $\mathrm{Al}<\mathrm{Ga}<\operatorname{In}<\mathrm{Tl}$ (stability $+1$ oxidation state)
(d) $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ (+3 O.S. stability increases)

Narayan Hari

Numerade Educator

Problem 112

Which of the following oxides is/are amphoteric?
1. $\mathrm{Na}_{2} \mathrm{O}$
2. $\mathrm{CaO}$
3. $\mathrm{Al}_{2} \mathrm{O}_{3}$
4. $\mathrm{SnO}_{2}$
(a) $2,3,4$
(b) 3,4
(c) 2,3
(d) 1,4

Shahina -

Numerade Educator

Problem 113

Which one of the following statements about halogens is incorrect?
(1) The electron affinities are in order $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$
(2) $\mathrm{F}_{2}$ has lower bond dissociation energy than $\mathrm{Cl}_{2}$
(3) $\mathrm{HF}$ is the strongest hydrothalic acid
(4) Van der Waals forces are the weakest in iodine
(a) 1,2 and 4
(b) 1,3 and 4
(c) 1,2 and 3
(d) 2,3 and 4

Narayan Hari

Numerade Educator

Problem 114

Consider the following substances:
1. OF,
2. $\mathrm{Cl}_{2} \mathrm{O}$
3. $\mathrm{Br}_{2} \mathrm{O}$
The correct sequence of $\mathrm{X}-\mathrm{O}-\mathrm{X}$ bond angle is
(a) $3>2>1$
(b) $1>2>3$
(c) $2>1>3$
(d) $1>3>2$

Narayan Hari

Numerade Educator

Problem 115

Consider the following properties of the noble gases:
1. They readily form compounds which are colourless
2. They generally do not form ionic compounds.
3. They have variable oxidation states in their compounds
4. Generally do not form covalent compounds Select the correct properties.
(a) 1
(b) 1,3
(c) 2,3
(d) $1,2,3$

Narayan Hari

Numerade Educator

Problem 116

Regarding $\mathrm{F}^{-}$and $\mathrm{Cl}^{-}$which of the following statements is correct?
1. Cl can give up an electron more easily than $\mathrm{F}^{-}$
2. $\mathrm{Cl}^{-}$is a better reducing agent than $\mathrm{F}^{-}$
3. $\mathrm{Cl}^{-}$is smaller in size than $\mathrm{F}^{-}$
4. $\mathrm{F}^{-}$can be oxidized more readily than $\mathrm{Cl}^{-}$
(a) 1,2 and 4
(b) 1 only
(c) 1 and 2
(d) 3 and 4

Narayan Hari

Numerade Educator

Problem 117

If ionization potential for hydrogen atom is $13.6 \mathrm{eV}$, then ionization potential for $\mathrm{He}^{+}$will be
(a) $6.5 \mathrm{eV}$
(b) $54.4 \mathrm{eV}$
(c) $13.6 \mathrm{eV}$
(d) $24.5 \mathrm{eV}$

Narayan Hari

Numerade Educator

Problem 118

Alkali metals are characterized by
1. good conductor of heat and electricity
2. high oxidation potentials
3. high melting point
4. solubility in liquid ammonia
(a) 1,2
(b) $2,3,4$
(c) $1,2,4$
(d) all of these

Shahina -

Numerade Educator

Problem 119

Which of the following orders are correct?
1. stability of $+3$ oxidation state decrease as $\mathrm{B}>\mathrm{Al}>$ $\mathrm{Ga}>\mathrm{In}>\mathrm{Tl}$
2. stability of hydrides of group 13 element decreases as $\mathrm{B}>\mathrm{Al}>\mathrm{Ga}>\mathrm{In}>\mathrm{Tl}$
3. reducing nature of group 13 elements decreases as $\mathrm{Al}>\mathrm{Ga}>\mathrm{In}>\mathrm{Tl}$
(a) $\mathrm{l}$ and 2
(b) 1 and 3
(c) 2 and 3
(d) 1,2 and 3

Narayan Hari

Numerade Educator

Problem 120

Match the following:
List I
1. thermal stability
2. acidic nature
3. boiling points
4. $\angle \mathrm{MMH}$ bond angle List II
(i) $\mathrm{H}_{2} \mathrm{~S}<\mathrm{H}_{2} \mathrm{Se}<\mathrm{H}_{2} \mathrm{Te}<\mathrm{H}_{2} \mathrm{PO}$
(ii) $\mathrm{H}_{2} \mathrm{O}>\mathrm{H}_{2} \mathrm{~S}>\mathrm{H}_{2} \mathrm{Se}>\mathrm{H}_{2} \mathrm{Te}$
(iii) $\mathrm{H}_{2} \mathrm{~S}<\mathrm{H}_{2} \mathrm{Se}<\mathrm{H}_{2} \mathrm{Te}<\mathrm{H}_{2} \mathrm{O}$
(iv) $\mathrm{H}_{2} \mathrm{~S}>\mathrm{H}_{2} \mathrm{Se}>\mathrm{H}_{2} \mathrm{Te}=\mathrm{H}_{2} \mathrm{PO}$
The correct matching is
1
$\begin{array}{lll}2 & 3 & 4\end{array}$
(a) (iii)
(ii)
(i)
(iv)
(b) (iv)
(i)
(ii)
(iii)
(c) (ii)
(i)
(iii)
(iv)
(d) (i)
(ii)
(iii)
(iv)

Hitendra Singh

Numerade Educator

Problem 121

Which of the following order is incorrect?
(1) $\mathrm{PH}_{3}<\mathrm{AsH}_{3}<\mathrm{SbH}_{3}<\mathrm{NH}_{3}$ (Melting point)
(2) $\mathrm{PH}_{3}<\mathrm{AsH}_{3}<\mathrm{NH}_{3}<\mathrm{SbH}_{3}$ (Boiling point)
(3) $\mathrm{NH}_{3}>\mathrm{PH}_{3}>\mathrm{AsH}_{3}>\mathrm{SbH}_{3}>\mathrm{BiH}_{3}$
(Dipole moment)
(a) only 1
(b) only 2
(c) both (1) and (2)
(d) none is incorrect here

Narayan Hari

Numerade Educator

Problem 122

Match the following:
List I List II
1. most electronegative
(i) $\mathrm{I}_{2}$
2. most electron affinity
(ii) At
3. liquid halogen
(iii) $\mathrm{F}_{2}$
4. radio active halogen
(iv) $\mathrm{Cl}_{2}$
(v) $\mathrm{Br}_{2}$
The correct matching is:
$\begin{array}{llll}1 & 2 & 3 & 4\end{array}$
(a)
(iii)
(iv)
(v)
(ii)
(b) $\begin{array}{ll}\text { (iii) (iv) } & \text { (v) }\end{array}$
(i)
(c)
(ii)
(i)
(iii)
(iv)
(d)
$\begin{array}{llll}\text { (iii) (i) } & \text { (ii) } & \text { (iv) }\end{array}$

Hitendra Singh

Numerade Educator

Problem 123

The incorrect statement/s among the following is /are
(a) $\mathrm{NCl}_{5}$ does not exist while $\mathrm{PCl}_{5}$ does
(b) Lead prefers to form tetravalent compounds
(c) The three $\mathrm{C}-\mathrm{O}$ bonds are not equal in the carbonate ion
(d) Both $\mathrm{O}_{2}^{+}$and $\mathrm{NO}$ are paramagnetic

Shahina -

Numerade Educator

Problem 124

Which of the following halogens does not turn starch iodine paper blue?
(a) $\mathrm{I}_{2}$
(b) $\mathrm{F}_{2}$
(c) $\mathrm{Cl}_{2}$
(d) $\mathrm{Br}_{2}$

Shahina -

Numerade Educator

Problem 125

Which among the following statements is/are correct here:
(a) He and Ne do not form clathrate
(b) $\mathrm{XeF}_{4}$ and $\mathrm{SbF}_{4}$ combine to form salt
(c) He has highest boiling point in its group
(d) He diffuses through rubber and polyvinyl chloride

Narayan Hari

Numerade Educator

Problem 126

Which of these is/are not true about the oxoacids of halogens?
(a) All of them are good reducing agents
(b) All of them are monobasic
(c) They may be monobasic as well as polybasic
(d) They have general formula HXOn.

Shahina -

Numerade Educator

Problem 127

Select the incorrect statement about Buckyball or Buckminister fullerene?
(a) It is an allotrope of carbon.
(b) It is referred as C-60 and C-70.
(c) In it carbon atoms are sp $^{3}$ hybridised.
(d) It is inert like diamond.

Narayan Hari

Numerade Educator

Problem 128

Which one of the following arrangements do not truely represent the property indicated against it?
(a) $\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}-$ Electronegativity
(b) $\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}-$ Bond energy
(c) $\mathrm{Br}_{2}<\mathrm{Cl}_{2}^{2}<\mathrm{F}_{2}-$ Electron affinity
(d) $\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}^{2}-$ oxidizing power

Shahina -

Numerade Educator

Problem 129

Which of the following noble gases do not form any compound?
(a) $\mathrm{Kr}$
(b) $\mathrm{He}$
(c) Xe
(d) Ne

Shahina -

Numerade Educator

Problem 130

Which of the following names can be used for group VIII A elements?
(a) Rare-earths
(b) Inert gases
(c) Rare gases of atmosphere
(d) Noble gases

Shahina -

Numerade Educator

Problem 131

Which of the following compounds contain boron?
(a) Colemanite
(b) Kernite
(c) Borax
(d) Cristoballite

Shahina -

Numerade Educator

Problem 132

Which of the following will displace the halogen from the solution of the halide?
(a) $\mathrm{Cl}_{2}$ added to a KBr solution
(b) $\mathrm{Br}_{2}$ added to an $\mathrm{NaCl}$ solution
(c) $\mathrm{Br}_{2}$ added to a KI solution
(d) $\mathrm{Cl}_{2}$ added to an $\mathrm{NaF}$ solution

Shahina -

Numerade Educator

Problem 133

Nitrogen is prepared by heating
(a) Microcosmic salt, $\mathrm{NaNH}_{4} \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O}$
(b) A mixture of $\mathrm{CuO}$ and $\mathrm{NH}_{3}$
(c) A mixture of $\mathrm{NH}_{4} \mathrm{Cl}$ and $\mathrm{NaNO}_{3}$
(d) Barium azide

Narayan Hari

Numerade Educator

Problem 134

Graphite is a
(a) Good conductor of electricity
(b) Good insulator
(c) Bad conductor of heat
(d) Good conductor of heat

Shahina -

Numerade Educator

Problem 135

Chlorine behaves as an oxidizing agent upon reaction with
(a) $\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}$
(b) $\mathrm{NaNO}_{2}$
(c) $\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}$
(d) $\mathrm{O}_{3}$

Narayan Hari

Numerade Educator

Problem 136

Which of the following allotropes of sulphar exist as $\mathrm{S}_{8}$ molecules with a puckered-ring structure assuming a crown conformation?
(a) $\alpha$-Rhombic
(b) $\beta$-Monoclinic
(c) $\gamma$-Rhombic
(d) $\gamma$-Monoclinic

Narayan Hari

Numerade Educator

Problem 137

Which of the following statements are correct for the nitrogen molecule?
(a) It is a good ligand
(b) The bond order is $2.2$
(c) It easily reacts with magnesium even at room temperature
(d) It is used in the Serpeck's process

Narayan Hari

Numerade Educator

Problem 138

Select the incorrect statement:
(a) Fluorine cannot show oxidation number greater than zero
(b) Halogens do not directly combine with oxygen
(c) Iodine can not displace chlorine from $\mathrm{KClO}_{3}$
(d) Euchlorine is a mixture of $\mathrm{Cl}_{2}$ and $\mathrm{Cl}_{2} \mathrm{O}_{7}$

Narayan Hari

Numerade Educator

Problem 139

Which of the following statement is/are correct?
(a) $\mathrm{C}_{60}$ has a geodesic dome structure.
(b) Solid $\mathrm{C}_{60}$ has a cubic close-packed structure
(c) The name buckminsterfullerene was given to $C_{\omega 0}$.
(d) The common name for $\mathrm{C}_{\omega 0}$ is 'bucky ball'

Narayan Hari

Numerade Educator

Problem 140

Which of the following are bent?
(a) $\mathrm{Br}_{3}^{+}$
(b) $\mathrm{I}_{3}^{-}$
(c) $\mathrm{I}_{3}+$
(d) $\mathrm{F}_{3}^{-}$

Narayan Hari

Numerade Educator

Problem 141

Which of the following pairs is/are correctly matched here:
(a) The strongest oxidizing agent - Iodine
(b) The most reactive halogen - Fluorine
(c) A halogen which is liquid at room temperature-Bromine
(d) The most electronegative element-Fluorine

Shahina -

Numerade Educator

Problem 142

Which of the following statements are correct for the $\mathrm{P}_{4}$ molecule?
(a) Its reacts with nitrogen to form a phosphorous nitrogen polymer
(b) The electron affinity of phosphorous is negative
(c) The P-P bond distance are equal
(d) The P-P-P bond angles are $60^{\circ}$.

Narayan Hari

Numerade Educator

Problem 143

Among the following, the correct statement is
(a) Phosphates have no biological significance in humans
(b) Between nitrates and phosphates, phosphates are less abundant in earth's crust
(c) Between nitrates and phosphates, nitrates are less abundant in earth's crust
(d) Oxidation of nitrates is possible in soil.

Vishal Sharma

Numerade Educator

Problem 144

Among the following, the correct statement is
(a) Between $\mathrm{NH}_{3}$ and $\mathrm{PH}_{3}, \mathrm{NH}_{3}$ is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional
(b) Between $\mathrm{NH}_{3}$ and $\mathrm{PH}_{3}, \mathrm{PH}_{3}$ is a better electron donor because the lone pair of electrons occupies $s p^{3}$ orbital and is more directional
(c) Between $\mathrm{NH}_{3}$ and $\mathrm{PH}_{3}, \mathrm{NH}_{3}$ is a better electron donor because the lone pair of electrons occupies $s p^{3}$ orbital and is less directional

Narayan Hari

Numerade Educator

Problem 145

White phosphorus on reaction with $\mathrm{NaOH}$ gives $\mathrm{PH}_{3}$ as one of the products. This is a
(a) Dimerization reaction
(b) Disproportional reaction
(c) Condensation reaction
(d) Precipitation reaction

Shahina -

Numerade Educator

Problem 146

The increasing order of the oxidizing capacity of the oxyacids of chlorine is
(a) $\mathrm{HClO}_{4}<\mathrm{HClO}_{3}<\mathrm{HClO}_{2}<\mathrm{HClO}$
(b) $\mathrm{HClO}_{3}<\mathrm{HClO}_{4}<\mathrm{HClO}_{2}<\mathrm{HClO}$
(c) $\mathrm{HClO}_{4}<\mathrm{HClO}_{3}^{*}<\mathrm{HClO}^{2}<\mathrm{HClO}_{2}$
(d) $\mathrm{HClO}<\mathrm{HClO}_{2}<\mathrm{HClO}_{3}<\mathrm{HClO}_{4}^{2}$

Narayan Hari

Numerade Educator

Problem 147

Among the oxyacids of the type $\mathrm{HXO}_{3}$, the weakest acid would be
(a) $\mathrm{HBrO}_{3}$
(b) $\mathrm{HIO}_{3}$
(c) $\mathrm{HClO}_{3}^{3}$
(d) al the three will be of same strength

Narayan Hari

Numerade Educator

Problem 148

The oxidizing power of $\mathrm{HXO}_{4}$ type compounds of halogens is in the order
(a) $\mathrm{HIO}_{4}>\mathrm{HBrO}_{4}>\mathrm{HClO}_{4}$
(b) $\mathrm{HIO}_{4}>\mathrm{HClO}_{4}>\mathrm{HBrO}_{4}$
(c) $\mathrm{HBrO}_{4}>\mathrm{HIO}_{4}>\mathrm{HClO}_{4}$
(d) $\mathrm{HClO}_{4}>\mathrm{HBrO}_{4}>\mathrm{HIO}_{4}$

Narayan Hari

Numerade Educator

Problem 149

Match the following
(a) Engel's sulphur
(p) Crystalline formyellow crystals
(b) $\chi-$ sulphur
(q) Fibrous or rubber like
(c) Rhombic sulphur
(r) Puckered $\mathrm{S}_{\mathrm{g}}$ rings (crown configuration)
(d) $\gamma$-monoclinic
(s) $\mathrm{S}_{4}$ rings, chair conformation, unstable

Shahina -

Numerade Educator

Problem 150

Match the following
(a) Boron
(p) Amphoteric oxide
(b) Carbon
(q) Acidic oxide
(c) Silicon
(r) Catenation
(d) Phosphorous
(s) Allotropy

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 151

Match the following
(a) $\mathrm{F}_{2}$
(p) Metallic lusture
(b) $\mathrm{Cl}_{2}$
(q) Most electronegative
(c) $\mathrm{Br}_{2}$
(r) Highest bond energy
(d) $\mathrm{I}_{3}$
(s) Reddish liquid

Shahina -

Numerade Educator

Problem 152

Match the following
(a) Diamond
(p) sp^{2} - h y b r i d i s a t i o n
(b) Graphite
(q) $\mathrm{sp}^{3}$-hybridisation
(c) Fullerene
(r) Tetrahedral
(d) Norbide
(s) Carbide

Shahina -

Numerade Educator

Problem 153

Match the following
(a) $\mathrm{F}_{2}$
(p) pale yellow coloured gas
(b) $\mathrm{Cl}_{2}$
(q) violet colour solid
(c) $\mathrm{Br}_{2}$
(r) orange red liquid
(d) $\mathrm{I}_{2}$
(s) greenish coloured gas

Shahina -

Numerade Educator

Problem 154

Match the following
(a) $\mathrm{F}_{2}$
(p) Oxidizing nature
(b) $\mathrm{Cl}_{2}$
(q) Reaction with dil or conc. $\mathrm{NaOH}$
(c) $\mathrm{Br}_{2}$
(r) Pale greenish yellow
(d) I
(s) No bleaching action

Shahina -

Numerade Educator

Problem 155

Match the following
(a) Oxygen
(p) Octa atomic
(b) Sulphur
(q) Diatomic
(c) Nitrogen
(r) Paramagnetic
(d) Chlorine
(s) Diamagnetic

Shahina -

Numerade Educator

Problem 156

$\mathrm{PCl}_{3}$ and $\mathrm{PCl}_{5}$ both exists; $\mathrm{NCl}_{3}$ exists but $\mathrm{NCl}_{5}$ does not exist. It is due to
(a) lower electronegativity of P than $\mathrm{N}$
(b) lower tendency of $\mathrm{N}$ to form covalent bond
(c) availability of vacant d orbital in P but not in $\mathrm{N}$
(d) statement is itself incorrect

Shahina -

Numerade Educator

Problem 157

Number of P-O bonds in $\mathrm{P}_{4} \mathrm{O}_{10}$ is
(a) 17
(b) 16
(c) 15
(d) 6

Shahina -

Numerade Educator

Problem 158

What may be expected to happen when phosphine gas is mixed with chlorine gas? [2002]
(a) the mixture only cools down
(b) $\mathrm{PCl}_{3}$ and $\mathrm{HCl}$ are formed and the mixture warms up
(c) $\mathrm{PCl}_{5}$ and $\mathrm{HCl}$ are formed and the mixture cools down
(d) $\mathrm{PH}_{3}-\mathrm{Cl}_{2}$ is formed with warming up

Narayan Hari

Numerade Educator

Problem 159

Which one of the following substances has the highest proton affinity? [2003]
(a) $\mathrm{NH}_{3}$
(b) $\mathrm{H}_{2} \mathrm{O}$
(c) $\mathrm{PH}_{3}$
(d) $\mathrm{H}_{2} \mathrm{~S}$

Shahina -

Numerade Educator

Problem 160

The solubilities of carbonates decrease down the magnesium group due to thedecrease in [2003]
(a) inter ionic interaction
(b) lattice energies of solids
(c) entropy of solution formation
(d) hydration energies of cations

Shahina -

Numerade Educator

Problem 161

The solubilities of carbonates decrease down the magnesium group due to a decrease in [2003]
(a) lattice energies of solids
(b) hydration energies of cations
(c) entropy of solution formation
(d) inter ionic attraction

Shahina -

Numerade Educator

Problem 162

Which one of the following ion has the highest value of ionic radius?
(a) $\mathrm{F}^{-}$
(b) $\mathrm{O}^{2-}$
(c) $\mathrm{B}^{3+}$
(d) $\mathrm{Li}^{+}$

Shahina -

Numerade Educator

Problem 163

Which one of the following ion has the highest value of ionic radius?
(a) $\mathrm{F}^{-}$
(b) $\mathrm{O}^{2-}$
(c) $\mathrm{B}^{3+}$
(d) $\mathrm{Li}^{+}$

Shahina -

Numerade Educator

Problem 164

Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point? [2005]
(a) $\mathrm{LiCl}$
(b) $\mathrm{NaCl}$
(c) $\mathrm{KCl}$
(d) $\mathrm{RbCl}$

Shahina -

Numerade Educator

Problem 165

The correct order of the thermal stability of hydrogen halides $(\mathrm{H}-\mathrm{X})$ is $\quad[2005]$
(a) $\mathrm{HCl}>\mathrm{HF}>\mathrm{HBr}>\mathrm{HI}$
(b) $\mathrm{HI}>\mathrm{HCl}>\mathrm{HF}>\mathrm{HBr}$
(c) $\mathrm{HI}>\mathrm{HBr}>\mathrm{HCl}>\mathrm{HF}$
(d) $\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}$

Shahina -

Numerade Educator

Problem 166

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which one of these statements gives the correct picture? [2006]
(a) the reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group
(b) in both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group
(c) chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens
(d) in alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group

Shahina -

Numerade Educator

Problem 167

The ionic mobility of alkali metal ions in aqueous solution is maximum for
(a) $\mathrm{K}^{+}$
(b) $\mathrm{Rb}^{+}$
(c) $\mathrm{Li}^{+}$
(d) $\mathrm{Na}^{+}$

Shahina -

Numerade Educator

Problem 168

The decreasing values of bond angles from $\mathrm{NH}_{3}$ $\left(106^{\circ}\right)$ to $\mathrm{SbH}_{3}\left(101^{\circ}\right)$ down group 15 of the periodic table is due to
(a) increasing bp-bp repulsion
(b) increasing p orbital character in sp $^{3}$
(c) decreasing lp-bp repulsion
(d) decreasing electronegativity

Shahina -

Numerade Educator

Problem 169

The stability of dihalides of $\mathrm{Si}$, Ge, $\mathrm{Sn}$ and $\mathrm{Pb}$ increases steadily in the sequence [2007]
(a) $S i X_{2}<G e X_{2}<P b X_{2}<\operatorname{Sn} X_{2}$
(b) $\mathrm{SiX}_{2}<\mathrm{GeX}_{2}<\operatorname{Sn} \mathrm{X}_{2}<\mathrm{Pb} \mathrm{X}_{2}$
(c) $\mathrm{PbX}_{2}<\operatorname{Sn} \mathrm{X}_{2}<\mathrm{GeX}_{2}<\mathrm{SiX}_{2}$
(d) $\mathrm{GeX}_{2}<\mathrm{SiX}_{2}<\mathrm{SnX}_{2}<\mathrm{Pb} \mathrm{X}_{2}$

Shahina -

Numerade Educator

Problem 170

In which of the following arrangements, the sequence is not strictly according to the property written against it? $\quad$ [2009]
(a) $\mathrm{HF}<\mathrm{HCl}<\mathrm{HBr}<\mathrm{HI}$ : increasing acid
strength
(b) $\mathrm{NH}_{3}<\mathrm{PH}_{3}<\mathrm{AsH}_{3}<\mathrm{SbH}_{3}:$ increasing basic
strength
(c) $\mathrm{B}<\mathrm{C}<\mathrm{O}<\mathrm{N}:$ increasing first ionization enthalpy
(d) $\mathrm{CO}_{2}<\mathrm{SiO}_{2}<\mathrm{SnO}_{2}<\mathrm{PbO}_{2}:$ increasing
oxidising power

Narayan Hari

Numerade Educator

Problem 171

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?
(a) $\mathrm{Na}_{2} \mathrm{O}<\mathrm{K}_{2} \mathrm{O}<\mathrm{MgO}<\mathrm{Al}_{2} \mathrm{O}_{3}$
(b) $\mathrm{Al}_{2} \mathrm{O}_{3}<\mathrm{MgO}<\mathrm{Na}_{2} \mathrm{O}<\mathrm{K}_{2} \mathrm{O}$
(c) $\mathrm{MgO}<\mathrm{K}_{2} \mathrm{O}<\mathrm{Al}_{2} \mathrm{O}_{3}<\mathrm{Na}_{2} \mathrm{O}$
(d) $\mathrm{K}_{2} \mathrm{O}<\mathrm{Na}_{2} \mathrm{O}<\mathrm{Al}_{2} \mathrm{O}_{3}<\mathrm{MgO}$

Shahina -

Numerade Educator

Problem 172

Which of the following statement is wrong? [2011]
(a) Single $\mathrm{N}-\mathrm{N}$ bond is weaker than the single $\mathrm{P}-\mathrm{P}$ bond
(b) Nitrogen cannot form $\mathrm{d} \pi-\mathrm{p} \pi$ bond
(c) The stability of hydrides increases from $\mathrm{NH}_{3}$ to $\mathrm{BiH}_{3}$ in group 15 of the periodic table.
(d) $\mathrm{N}_{2} \mathrm{O}_{4}$ has two resonance structures.

Shahina -

Numerade Educator

Problem 173

The molecule having smallest bond angle is [2012]
(a) $\mathrm{SbCl}_{3}$
(b) $\mathrm{A}_{\mathrm{sCl}}_{3}$
(c) $\mathrm{NCl}_{3}$
(d) $\mathrm{PCl}_{3}$

Shahina -

Numerade Educator

Problem 174

Which of the following represents the correct order of increasing first ionization enthalpy for $\mathrm{Ca}, \mathrm{Ba}, \mathrm{S}, \mathrm{Se}$ and Ar?
(a) $\mathrm{Ba}<\mathrm{Ca}<\mathrm{Se}<\mathrm{S}<\mathrm{Ar}$
(b) $\mathrm{Ca}<\mathrm{Ba}<\mathrm{S}<\mathrm{Sr}<\mathrm{Ar}$
(c) $\mathrm{Ca}<\mathrm{S}<\mathrm{Ba}<\mathrm{Se}<\mathrm{Ar}$
(d) $\mathrm{S}<\mathrm{Se}<\mathrm{Ca}<\mathrm{Ba}<\mathrm{Ar}$

Shahina -

Numerade Educator