A Complete Resource Book in Chemistry for JEE Main

A.K. Singhal

Chapter 23

General Organic Chemistry I - all with Video Answers

Educators

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Chapter Questions

Problem 1

The IUPAC name of $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCl}$ is
(a) benzoyl chloride
(b) benzene chloroketone
(c) benzene carbonyl chloride
(d) chlorophenyl ketone

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 2

In the reaction, $\mathrm{CH}_{3} \mathrm{CHO}+\mathrm{HCN} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{CN}$
a chiral centre is produced. This product would be
(a) racemic mixture
(b) meso compound
(c) dextrorotatory
(d) laevorotatory

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 3

Optical activity is measured by
(a) refractometer
(b) tracer technique
(c) spectrograph
(d) polarimeter

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 4

The compound having only primary hydrogen atoms is
(a) isobutene
(b) 2,3 -dimethyl but- 2 -ene
(c) cyclohexane
(d) propyne

Narayan Hari

Numerade Educator

Problem 5

Which of the following shows geometrical isomerism?
(a) but-1-ene
(b) but-2-ene
(c) 2,3 -dichlorobutane
(d) ethene

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 6

The number of optically active isomers of tartaric acid is
<smiles>CC(O)C(=O)O</smiles> $\mathrm{CH}(\mathrm{OH}) \mathrm{COOH}$
(a) 2
(b) 3
(c) 4
(d) 1

Vasu Makani

Numerade Educator

Problem 7

The compound in which $\mathrm{C}$ uses only its $\mathrm{sp}^{3}$ hybrid orbitals for bond formation is
(a) $\mathrm{HCOOH}$
(b) $\left(\mathrm{NH}_{2}\right)_{2} \mathrm{CO}$
(c) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}$
(d) $\mathrm{CH}_{3} \mathrm{CHO}$

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 8

Number of isomers which can be obtained theoretically from monochlorination of 2 -methylbutane are
(a) 2
(b) 3
(c) 4
(d) 5

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 9

An organic molecule necessarily shows optical activity if it
(a) is non-superimposable on its mirror image
(b) is superimposable on its mirror image
(c) contains asymmetric carbon atoms
(d) is non-polar

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 10

The C-H bond distance is longest in
(a) $\mathrm{C}_{2} \mathrm{H}_{2}$
(b) $\mathrm{C}_{2} \mathrm{H}_{4}$
(c) $\mathrm{C}_{2} \mathrm{H}_{6}$
(d) $\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{Br}_{2}$

Narayan Hari

Numerade Educator

Problem 11

How many structural isomers of $\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}$ that are ethers?
(a) 1
(b) 2
(c) 3
(d) 4

Vasu Makani

Numerade Educator

Problem 12

Which of the following has zero dipole moment?
(a) 1 -butene
(b) cis-2-butene
(c) trans-2-butene
(d) 2 methyl-1-propene

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 13

The IUPAC name of the following compound is
(a) $2,4,5$-triheptene
(b) $2,4,6$-triheptene
(c) hepta- $1,3,5$-triene
(d) $2,4,6$-hepttriene

Vasu Makani

Numerade Educator

Problem 14

The most stable conformation of ethylene glycol is
(a) anti
(b) gauche
(c) fully eclipsed
(d) partially eclipsed

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 15

The total number of isomers for $\mathrm{C}_{4} \mathrm{H}_{8}$ are
(a) 8
(b) 7
(c) 6
(d) 5

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 16

$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{C} \equiv \mathrm{N}$ and $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N} \rightrightarrows \mathrm{C}$ are which type of isomers?
(a) tautomerism
(b) position
(c) functional
(d) linkage

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 17

The IUPAC name of following compound is
(a) cis-octadec-9-enoic acid
(b) trans-octadec-9-enoic acid
(c) oleic acid
(d) none of these

Vasu Makani

Numerade Educator

Problem 18

How many stereoisomers are there for tartaric acid?
(a) 3
(b) 4
(c) 5
(d) 0

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 19

The number of enantiomers of the compound $\mathrm{CH}_{3} \mathrm{CHBrCHBrCOOH}$ is
(a) 1
(b) 2
(c) 3
(d) 4

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 20

The IUPAC name of compoud
(a) $1,2,3$-tricyanopropane
(b) Propane-1, 2,3 -tricarbonitrile
(c) 3 -cyanopentane- 1,5 -dinitrile
(d) Propane-1, 2,3 -trinitrile.

Hitendra Singh

Numerade Educator

Problem 21

Which of the following compounds will show metamerism?
(a) $\mathrm{CH}_{3}-\mathrm{O}-\mathrm{C}_{2} \mathrm{H}_{5}$
(b) $\mathrm{CH}_{3}-\mathrm{O}-\mathrm{CH}_{3}$
(c) $\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{C}_{2} \mathrm{H}_{5}$
(d) $\mathrm{C}_{2} \mathrm{H}_{5}-\mathrm{S}-\mathrm{C}_{2} \mathrm{H}_{5}$

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 22

What will be the IUPAC name of given compound?
(a) 2,5 -diethyl-4-methylhexane
(b) $3,3,6$-trimethyloctane
(c) $2,5,6$-trimethyloctane
(d) 3,5 -dimethyl-6-ethylheptane

Vasu Makani

Numerade Educator

Problem 23

In the boat conformation of cyclohexane, the most destabilizing interaction is
(a) eclipsing
(b) flagpole-flagpole
(c) 1,3 -diaxial
(d) 1,3 -diequatorial

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 24

The most stable conformation of $\mathrm{n}$-butane is
(a) eclipsed
(b) gauche
(c) anti-staggered
(d) skew-boat

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 25

Tautomerism will be exhibited by
(a) $\mathrm{R}_{3} \mathrm{CNO}_{2}$
(b) $\mathrm{RCH}_{2} \mathrm{NO}_{2}$
(c) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$
(d) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CNO}$

Narayan Hari

Numerade Educator

Problem 26

(+)-mandelic acid has a specific rotation of $+158^{\circ}$. What would be the observed specific rotation of a mixture containing $25 \%$ (-)-mandelic acid and $75 \%$ (+)-mandelic acid?
(a) $+79^{\circ}$
(b) $-118.5^{\circ}$
(c) $-79^{\circ}$
(d) $+118.5^{\circ}$

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 27

The IUPAC name of the following compound is
(a) biscyclobutylcyclobutane
(b) dicyclobutylcyclobutane
(c) $1,1^{\prime}, 2^{\prime}, 1^{\prime \prime}$-tercyclobutane
(d) tercyclobutane

Narayan Hari

Numerade Educator

Problem 28

Among the following, the most stable compound is
(a) cis-1, 2-cyclohexanediol
(b) trans- 1,2 -cyclohexanediol
(c) cis-1, 3-cyclohexenediol
(d) trans-1,3-cyclohexanediol

Hitendra Singh

Numerade Educator

Problem 29

The number of isomers possible for $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$ are
(a) 3
(b) 4
(c) 5
(d) 6

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 30

The number of geometrical isomers of
$\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CHCl}$ are
(a) 4
(b) 6
(c) 8
(d) 10

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 31

$\mathrm{C}_{3} \mathrm{H}_{9} \mathrm{~N}$ cannot represent
(a) quaternary salt
(b) $1^{\circ}$ amine
(c) $2^{\circ}$ amine
(d) $3^{\circ}$ amine

Vasu Makani

Numerade Educator

Problem 32

The IUPAC name of the following compound is
(a) 5,6 -diethyl-8-methyldec-6-ene
(b) 5,6 -diethyl-3-methyldec-4-ene
(c) 6-butyl-5-ethyl-3-methylloct-4-ene
(d) 4,5 -diethyl-8-methyldec-6-ene

Vasu Makani

Numerade Educator

Problem 33

Which of the following is optically active?
(a) butane
(b) 2 -methylpentane
(c) 4 -methylpentane
(d) 3 -methylheptane

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 34

The hybridization of carbon atoms in C-C single bond of $\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2}$ is
(a) sp $^{3}-s p^{3}$
(b) $s p^{2}-s p^{3}$
(c) $\mathrm{sp}^{2}-\mathrm{sp}$
(d) $\mathrm{sp}^{3}-\mathrm{sp}$

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 35

Number of stereoisomers of the compound, 2 -chloro4-methylhex-2-ene is
(a) 2
(b) 4
(c) 6
(d) 7

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 36

Number of $\pi$-electrons in cyclobutadienyl anion $\left(\mathrm{C}_{4} \mathrm{H}_{4}\right)^{2-}$ is
(a) 2
(b) 4
(c) 6
(d) 8

Alkendra Singh

Numerade Educator

Problem 37

The $\mathrm{R}$ and $\mathrm{S}$ enantiomers of an optically active compound differs in
(a) their optical rotation of plane polarized light
(b) their reactivity with a chiral reagents
(c) their solubility in achiral reagents
(d) their melting points

Narayan Hari

Numerade Educator

Problem 38

The number of primary amines of formula $\mathrm{C}_{4} \mathrm{H}_{11} \mathrm{~N}$ are
(a) 2
(b) 3
(c) 4
(d) 5

Vasu Makani

Numerade Educator

Problem 39

But-2-ene exhibits cis-transisomerism due to
(a) rotation around $\mathrm{C}_{3}-\mathrm{C}_{4}$ sigma bond
(b) rotation around $\mathrm{C}_{1}-\mathrm{C}_{2}$ bond
(c) restricted rotation around $C=C$ bond
(d) rotation around $\mathrm{C}_{2}-\mathrm{C}_{3}$ double bond

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 40

The two optical isomers given below, namely+
(a) enantiomers
(b) geometrical isomers
(c) structural isomers
(d) diastereomers

Narayan Hari

Numerade Educator

Problem 41

The $\mathrm{C}-\mathrm{C}$ bond length of the following molecules are in the order
(a) $\mathrm{C}_{2} \mathrm{H}_{6}>\mathrm{C}_{2} \mathrm{H}_{4}>\mathrm{C}_{6} \mathrm{H}_{6}>\mathrm{C}_{2} \mathrm{H}_{2}$
(b) $\mathrm{C}_{2} \mathrm{H}_{2}<\mathrm{C}_{2} \mathrm{H}_{4}<\mathrm{C}_{6}{ }^{0} \mathrm{H}_{6}<\mathrm{C}_{2} \mathrm{H}_{6}^{2}$
(c) $\mathrm{C}_{2} \mathrm{H}_{6}>\mathrm{C}_{2} \mathrm{H}_{2}>\mathrm{C}_{6} \mathrm{H}_{6}>\mathrm{C}_{2} \mathrm{H}_{4}$
(d) $\mathrm{C}_{2} \mathrm{H}_{4}>\mathrm{C}_{2} \mathrm{H}_{6}>\mathrm{C}_{2}^{\circ} \mathrm{H}_{2}>\mathrm{C}_{6}^{2} \mathrm{H}_{6}$

Narayan Hari

Numerade Educator

Problem 42

An isomer of ethanol is
(a) methanol
(b) diethyl ether
(c) acetone
(d) dimethyl ether

Shahina -

Numerade Educator

Problem 43

An organic molecule necessarily shows optical activity if it
(a) contains asymmetric carbon atoms
(b) is non-planar
(c) is non-superimposable on its mirror image
(d) is superimposable on its mirror image

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 44

The IUPAC name of the given compound is
(a) 1, 1 -Cyclobutylheptane
(b) bicyclo $[6,3,0]$ nonane
(c) sipro $[3,6]$ decane
(d) spiro $[3,5]$ decane

Narayan Hari

Numerade Educator

Problem 45

The IUPAC name of the following compound is
(a) 3 -methyl cyclohexene
(b) 1 -methyl cyclohex-2-ene
(c) 6 -methyl cyclohexene
(d) 1 -methyl cyclohex-5-ene

Vasu Makani

Numerade Educator

Problem 46

The maximum number of carbon atoms arranged linearly in the molecule, $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2}$ are
(a) 3
(b) 4
(c) 5
(d) 6

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 47

The IUPAC name of cinnamic acid is
(a) phenylpropanoic acid
(b) 3-phenylprop-2-enoic acid
(c) 3-phenylpropanoic acid
(d) benzene-1, 4 -dicarboxylic acid

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 48

IUPAC name of the given compound is
(a) 2 -cyano- 4 -methylpentane
(b) 2 -methyl- 4 -cyanopentane
(c) 2,4 -dimethyl pentane 1,4 di-nitrile
(d) 2 -dimethyl- 4 -cyanopentane

Vasu Makani

Numerade Educator

Problem 49

The IUPAC name of the compound $\mathrm{CH}_{3}-\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}-\mathrm{CH}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$ is
(a) $1,1,3,3$-tetramethyl-but- 1 -ene
(b) $1,3,3$-trimethyl-pent $-2$-ene
(c) $2,2,4$-trimethylbut- 4 -ene
(d) $2,4,4$-trimethylpent- 2 -ene

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 50

One recently discovered allotrope of carbon $\left(\mathrm{C}_{\omega 0}\right)$ is commonly known as
(a) fluorine
(b) fluorene
(c) freon
(d) fullerene

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 51

The optically active tartaric acid is named as $\mathrm{D}-(+)=$ tartaric acid because it has a positive
(a) optical rotation and is derived from D-glucose
(b) $\mathrm{pH}$ in an organic solvent
(c) optical rotation and is derived from D-(t)= glyceraldehyde
(d) optical rotation only when substituted by deuterium

Narayan Hari

Numerade Educator

Problem 52

The correct IUPAC name of the compound, is
(a) p-phenyldiphenyl
(b) $\mathrm{p}, 1$-diphenylbenzene
(c) $1,1^{\prime}, 4^{\prime} .1^{\prime \prime}$-terphenyl
(d) terphenyl

Alkendra Singh

Numerade Educator

Problem 53

Keto $-$ enol tautomerism is observed in :
(a) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}$
(b) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OCH}_{3}$
(c) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{2} \mathrm{COOH}$
(d) $\mathrm{C}_{6} \mathrm{H}_{3} \mathrm{COC}_{6} \mathrm{H}_{5}$

Narayan Hari

Numerade Educator

Problem 54

The IUPAC name of is the following compound
(a) $1,2,3$-tricarboxy-2-hydroxy propane
(b) 3 -carboxy $-3$-hydroxy- 1,5 -pentane dioic acid
(c) 2 -hydroxy-3-carboxy pentan 1,5 -dioic acid
(d) 3 -hydroxypropane- $1,2,3$-tricarboxylic acid

Vasu Makani

Numerade Educator

Problem 55

The given compound can exhibit
(a) geometrical isomerism
(b) optical isomerism
(c) geometrical and optical isomerism
(d) conformational isomerism

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 56

Maximum enol content is observed in
(a) $\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{COOC}_{2} \mathrm{H}_{5}$
(b)
(c) $\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{COCH}_{3}$
(d) $\mathrm{CH}_{3} \mathrm{COCH}_{3}$

Alkendra Singh

Numerade Educator

Problem 57

Assign the IUPAC name to $\left[\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CH}\right]_{3} \mathrm{COH}$.
(a) 3-(2-methylethyl)- $3(1$-methylethyl) pentan-2-ol
(b) tris-(1-methylpropyl)methanol
(c) 2,4 -dimethyl-3 (1-methylethyl) pentan- $2-\mathrm{ol}$
(d) 3 -(1-methylethyl) $-2,4$-dimethylpentan-3-ol

Hitendra Singh

Numerade Educator

Problem 58

Which will exhibit geometrical isomerism here?
(a) $\mathrm{A}_{2} \mathrm{C}=\mathrm{CAB}$
(b) $\mathrm{A}_{2} \mathrm{C}=\mathrm{CB}_{2}$
(c) $\mathrm{ABC}=\mathrm{CAB}$
(d) $\mathrm{ABC}=\mathrm{CX}_{2}$

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 59

How many tertiary carbon atoms are present in the given compound
(a) 3
(b) 4
(c) 2
(d) 5

Vasu Makani

Numerade Educator

Problem 60

2 -methylpenta- 2,3 -diene is achiral as it has
(a) a centre of symmetry
(b) a plane of symmetry
(c) a $C_{2}$ axis of symmetry
(d) both centre and a plane of symmetry

Narayan Hari

Numerade Educator

Problem 61

Which class of compound can exhibit geometrical isomerism
(a) $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3}$
(b) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}=\mathrm{NOH}$
(d) All of these

Alkendra Singh

Numerade Educator

Problem 62

How many $\sigma$ and $\pi$-bonds are there in the molecule of tetracyanoethylene?
(a) $9 \sigma$ and $9 \pi$
(b) $5 \sigma$ and $9 \pi$
(c) $9 \sigma$ and $7 \pi$
(d) $5 \sigma$ and $8 \pi$

Vasu Makani

Numerade Educator

Problem 63

The bond between carbon atom (1) and carbon atom $(2)$ in compound $\mathrm{N} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_{2}$ involves the hybridization
(a) $\mathrm{sp}^{2}$ and $\mathrm{sp}^{2}$
(b) $\mathrm{sp}^{3}$ and sp
(c) sp and sp²
(d) sp and sp

Narayan Hari

Numerade Educator

Problem 64

How many secondary carbon and hydrogen atoms are present in the molecule given below respectively?
(a) 2,3
(b) 2,2
(c) 3,3
(d) 2,0

Vasu Makani

Numerade Educator

Problem 65

Which IUPAC name is correct for the given compound?
(a) 3,7 -dimethyloct-2, 6-dienal
(b) 2,6 -dimethyloct- 2,6 -dienal-8
(c) 7 -formyl-2, 6 -dimethylhept $-2,6$-diene
(d) 7 -aldo-2, 6 -dimethylhept- 2,6 -diene

Hitendra Singh

Numerade Educator

Problem 66

The compound given below has how many primary and tertiary hydrogen atoms respectively?
(a) 18,1
(b) 18,2
(c) 16,2
(d) 18,4

Alkendra Singh

Numerade Educator

Problem 67

The total number of optically active isomers for $\mathrm{CH}_{2} \mathrm{OH}(\mathrm{CHOH})_{3} \mathrm{CHO}$ are
(a) 16
(b) 8
(c) 4
(d) 2

Alkendra Singh

Numerade Educator

Problem 68

If optical rotation produced by compound (1) is $36^{\circ}$ then the rotation produced by compound (2) is
(a) $-36^{\circ}$
(b) $0^{\circ}$
(c) $+18^{\circ}$
(d) $+72^{\circ}$

Alkendra Singh

Numerade Educator

Problem 69

Total number of isomers and optically active compounds in the isomers of $\mathrm{C}_{3} \mathrm{H}_{3} \mathrm{Br}$ are
(a) 6,4
(b) 5,3
(c) 3,5
(d) 8,3

Alkendra Singh

Numerade Educator

Problem 70

On monochlorination of $n$-pentane, the number of isomers formed is are
(a) 4
(b) 3
(c) 2
(d) 1

Vasu Makani

Numerade Educator

Problem 71

The number of possible open chain (acyclic) isomeric compounds for molecular formula $\mathrm{C}_{5} \mathrm{H}_{10}$ would be
(a) 5
(b) 6
(c) 7
(d) 4

Vasu Makani

Numerade Educator

Problem 72

The IUPAC name of the following compound is
(a) 4-hydrazonocyclohexane-1-carboxylic acid
(b) 4-hydrazonobenzoic acid
(c) 4-hydrazonocyclohexanoic acid
(d) 4 -(n-amino) benzenecarboxylic acid

Vasu Makani

Numerade Educator

Problem 73

The compound (1) and (2) can be regarded as
(a) enantiomers
(b) diastereomers
(c) mesomers
(d) geometrical isomer

Narayan Hari

Numerade Educator

Problem 74

Consider the following organic compound,
(a) 1
(b) 4
(c) 3
(d) 6

Anupa Sharad Medhekar

Anupa Sharad Medhekar

Numerade Educator

Problem 75

Assign the IUPAC name for the following compound.
(a) 3,4 -dichloroazobenzene
(b) (4-chlorophenyl) (3-chlorophenyl) diazene
(c) 3,4 -bis(chlorophenyl) diazene
(d) (3-chlorophenyl) (4-chlorophenyl) diazene

Hitendra Singh

Numerade Educator

Problem 76

Write the IUPAC name of the following compound.
(a) ethyl-2-(chlorocarbonyl) benzoate
(b) ethyl-2-(chlorocarbonyl) hexanoate
(c) 2 -(ethoxycarbonyl) benzoyl chloride
(d) none of these

Hitendra Singh

Numerade Educator

Problem 77

Assign the IUPAC name for the following compound.
(a) 3 -methyl hexane- $1,2,3$-tricarbonitrile
(b) hexane- $1,2,3$-tricarbonitrile
(c) 1,2 -bis (cyanomethyl) butanenitrile
(d) 3 -(cyanomethyl) hexane 1,6 -di-nitaite

Hitendra Singh

Numerade Educator

Problem 78

The IUPAC name of the compound is
(a) 6-oxo-2-methyl hex-3-enamide
(b) 6 -keto-2-methyl hexanamide
(c) 2-carbamoylhexanal
(d) 2 -carbamoylhex-3-enal

Hitendra Singh

Numerade Educator

Problem 79

The number of chiral carbon atoms in the given com pound is are
(a) 2
(b) 3
(c) 4
(d) 1

Vasu Makani

Numerade Educator

Problem 80

A compound with molecular formula $\mathrm{C}_{7} \mathrm{H}_{16}$ shows optical isomerism. The compound will be
(a) 2 -methylhexane
(b) 2,2 -dimethylpentane
(c) 2,3 -dimethylpentane
(d) none of these

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 81

In the following reaction,
an asymmetric centre is generated. The acid obtained would be
(a) L-isomer
(b) D-isomer
(c) $20 \% \mathrm{D}+80 \%$ L-isomer
(d) $50 \% \mathrm{D}+50 \%$ L-isomer

Narayan Hari

Numerade Educator

Problem 82

Which of the following represents the given mode of hybridization $s p^{2}-s p^{2}-s p-$ sp from left to right?
(a) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{CN}$
(b) $\mathrm{CH} \equiv \mathrm{C}-\mathrm{C} \equiv \mathrm{N}$
(c) $\mathrm{CH}_{2}=\mathrm{C}=\mathrm{C}=\mathrm{CH}_{2}$
(d) $\mathrm{CH}_{2}$

Vasu Makani

Numerade Educator

Problem 83

Which of the following hydrocarbons has the lowest dipole moment?
(a)
(b) $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}$
(c) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CH}_{2}$
(d) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{CH}$

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 84

How many stereo isomers are possible for the compound shown below?
(a) 4
(b) 2
(c) 8
(d) 6

Alkendra Singh

Numerade Educator

Problem 85

In the compound, $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{CH}$, the
$\mathrm{C}_{2}-\mathrm{C}_{3}$ bond is of the type
(a) $s p-s p^{2}$
(b) $s p^{3}-5 p^{3}$
(c) $\mathrm{sp}-\mathrm{sp}^{3}$
(d) $s p^{2}-s p^{3}$

Vasu Makani

Numerade Educator

Problem 86

Which type of conformation is shown by figure 1 and $2 ?$
(1)
(2)
(a) 1 is eclipsed and 2 is staggered
(b) 1 is staggered and 2 is eclipsed
(c) 1 is eclipsed and 2 is gauche
(d) both are gauche

Alkendra Singh

Numerade Educator

Problem 87

An organic compound $\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}$ is found to be optically active. Which of the following is correct structure of the given compound?
(a) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCHO}$
(b) $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}(\mathrm{OH}) \mathrm{CH}_{3}$
(c) $\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{CH}_{3}$
(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}$

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 88

The number of optical isomers formed by hydrogenation of the compound, $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CHCH}_{3}$ are
(a) 0
(b) 1
(c) 2
(d) 3

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 89

Which of the following can exhibit optical isomerism?
(a) 1 and 2
(b) 2 and 4
(c) 3 only
(d) 2 only

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 90

The number and type of bonds between two carbon atoms in $\mathrm{CaC}_{2}$ are
(a) one sigma and one $\pi$ bond
(b) one sigma and two $\pi$ bonds
(c) one sigma and one and a half $\pi$ bonds
(d) one sigma bond

Narayan Hari

Numerade Educator

Problem 91

Which of the following has the least hindered rotation about carbon-carbon bond?
(a) ethane
(b) ethylene
(c) acetylene
(d) hexachloroethane

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 92

Among these ketones which of the following is correct order of the case of their enolizations?
(a) $1>2>3$
(b) $3>2>1$
(c) $2>1>3$
(d) $3>1=2$

Alkendra Singh

Numerade Educator

Problem 93

The $\mathrm{Cl}-\mathrm{C}-\mathrm{Cl}$ angle in $1,1,2,2$-tetrachloroethene and tetrachloromethane will be about
(a) $120^{\circ}$ and $109.5^{\circ}$
(b) $90^{\circ}$ and $109.5^{\circ}$
(c) $109.5^{\circ}$ and $90^{\circ}$
(d) $109.5^{\circ}$ and $120^{\circ}$

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 94

Ibuprofen has the following structure, this compound shows
(a) geometrical isomerism
(b) optical isomerism
(c) tautomerism
(d) both (a) and (b)

Narayan Hari

Numerade Educator

Problem 95

The compound with an isopropyl group is
(a) $2,2,3,3$-tetramethylpentane
(b) 2,2 -dimethylpentane
(c) $2,2,3$-trimethylpentane
(d) 2 -methylpentane

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 96

The enolic form of acetone contains
(a) 9 sigma bonds, 1 pi bond and 2 lone pair of electrons
(b) 8 sigma bonds, 2 pi bonds and 2 lone pair of electrons
(c) 10 sigma bonds, 1 pi bond and 1 lone pair of electrons
(d) 9 sigma bonds, 2 pi bonds and 1 lone pair of electrons

Narayan Hari

Numerade Educator

Problem 97

How many chiral carbon atoms are present in 2,3 , 4-trichloropentane?
(a) three
(b) two
(c) one
(d) four

Vasu Makani

Numerade Educator

Problem 98

The IUPAC name of $\mathrm{CH}_{3}-\mathrm{CH}-\mathrm{CHO}$ is
(a) butan-2-aldehyde
(b) 2 -methylbutanal
(c) 3-methylisobutyraldehyde
(d) 3-methylbutanal

Vasu Makani

Numerade Educator

Problem 99

An optically active compound is
(a) 1-bromobutane
(b) $\beta$-bromobutyric acid
(c) 2 -bromo-2-methylpropane
(d) 1 -bromo-2-methylpropane

Susan Hallstrom

Susan Hallstrom

Numerade Educator

Problem 100

On monochlorination of 2 -methyl butane, the total number of chiral compounds is
(a) 2
(b) 4
(c) 6
(d) 8

Alkendra Singh

Numerade Educator

Problem 101

Which of the following compounds exhibit steroisomerism?
(a) 2 -methylbutene-1
(b) 3 -methylbutyne-1
(c) 3 -methylbutanoic acid
(d) 2 -methylbutanoic acid

Alkendra Singh

Numerade Educator

Problem 102

The number of isomers for the compound with molecular formula $\mathrm{C}_{2} \mathrm{BrClFI}$ is
(a) 3
(b) 4
(c) 5
(d) 6

Alkendra Singh

Numerade Educator

Problem 103

Which of the following compounds will exhibit geometrical isomerism?
(a) 1-phenyl-2-butene
(b) 3 -phenyl-1-butene
(c) 2 -phenyl-1-butene
(d) 1,1 -diphenyl-1-propene

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 104

Which of the following compounds will show geometrical isomerism?
1. 2 -butene
2. propene
3. 1 -phenylpropene
4. 2 -methylbut-2-ene
(a) 1,2
(b) 3,4
(c) $1,2,3$
(d) 1,3

Alkendra Singh

Numerade Educator

Problem 105

How many optically active stereoisomers are possible for butan- 2,3 -diol?
(a) 1
(b) 2
(c) 3
(d) 4

Narayan Hari

Numerade Educator

Problem 106

Choose the correct statement about the compounds $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$.
(a) $\mathrm{A}$ and $\mathrm{B}$ are identical
(b) $\mathrm{A}$ and $\mathrm{B}$ are diastereomers
(c) A and $\mathrm{C}$ are enantiomers
(d) A and B enantiomers

Narayan Hari

Numerade Educator

Problem 107

The number of possible enantiomeric pairs than can be produced during monochlorination of 2 -methyl butane is
(a) 2
(b) 3
(c) 4
(d) 1

Alkendra Singh

Numerade Educator

Problem 108

Which of the following represents the meso form of 2 , 3-dibromobutane?

Alkendra Singh

Numerade Educator

Problem 109

The favoured conformation (Gauche, anti or eclipsed) for the molecule 1,2 -dichloro ethene 1,2 -ethanediol and propanaldehyde will be respectively
(a) anti, eclipsed, gauche
(b) anti, gauche, eclipsed
(c) eclipsed, anti, gauche
(d) Gauche, anti, eclipsed

Alkendra Singh

Numerade Educator

Problem 110

Which is true regarding the $\mathrm{HOCH}_{2}-(\mathrm{CHOH})_{4}$ $-\mathrm{CH}_{2} \mathrm{OH} ?$
(1) the number of racemic mixtures will be four for the compound.
(2) the total number of optical isomers is ten and number of meso isomer is two.
(3) the total number of optical isomer is sixteen and number of meso isomer is zero.
(4) the optically active isomers are eight while meso isomers are two.
(a) 1,2 and 3
(b) 2,3 and 4
(c) 1,2 and 4
(d) 1 and 2 only

Alkendra Singh

Numerade Educator

Problem 111

Consider the following compounds given below and select the correct statement.

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 112

Match the following:
List I List II
1. $\mathrm{CH}_{3} \mathrm{COOH}$ and $\mathrm{HCOOCH}_{3}$
(i) metamers
2. $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{CH}$ and
(ii) position isomers $\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}$
3. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}$ and
(iii) tautomers $\mathrm{CH}_{3}-\mathrm{CH}\left(\mathrm{NH}_{2}\right)-\mathrm{CH}_{3}$
4. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$ and $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{O}$
(iv) functional isomer
The correct matching is:
$\begin{array}{llll}1 & 2 & 3 & 4\end{array}$
(a) (iii)
(iv) (i) (iv)
(b) (i)
(ii) (iii) (iv)
(c) (iii)
(ii) (i) (iv)
(d) (iv)
(ii) (ii) (iv)

Alkendra Singh

Numerade Educator

Problem 113

Consider the following statements:
(1) racemic forms are not optically active but are resolvable
(2) the presence of chiral atom is sufficient but not the necessary condition for enantiomer
(3) meso compounds are inactive and are not resolvable
(4) conformational enantiomers can be resolved
Nuw select the conrect statements.
(a) 1,2 and 3
(b) 2,3 and 4
(c) 1,2 and 4
(d) $1,2,3$ and 4

Alkendra Singh

Numerade Educator

Problem 114

Identify $\mathrm{E}$ and $\mathrm{Z}$ configurations of the following:
(a) $1(\mathrm{E}), 2(\mathrm{Z}), 3(\mathrm{E}), 4(\mathrm{Z})$
(b) $1(\mathrm{Z}), 2(\mathrm{E}), 3(\mathrm{Z}), 4(\mathrm{E})$
(c) $1(\mathrm{Z}), 2(\mathrm{Z}), 3(\mathrm{E}), 4(\mathrm{E})$
(d) $1(\mathrm{Z}), 2(\mathrm{Z}), 3(\mathrm{E}), 4(\mathrm{Z})$

Alkendra Singh

Numerade Educator

Problem 115

Which is incorrectly matched? Common name $\quad$ IUPAC name
(a) Vanillin 4-hydroxy-3-methoxybenzaldehyde
(b) Protocatechual- $\quad 2,3$-dihydroxydehyde benzaldehyde
(c) Adipic acid hexanl, 6 -dioic acid
(d) Pyruvic acid cis-2-methylbut-2-enoic acid

Narayan Hari

Numerade Educator

Problem 116

How many structural and geometrical isomers are possible for dimethyl cyclohexane?
(a) 3,3
(b) 3,6
(c) 6,6
(d) 6,3

Alkendra Singh

Numerade Educator

Problem 117

Consider the following statements about chirality:
1. molecules which are not superimposable on their mirror images are achiral
2. a chiral molecule can have simple axis of symmetry
3. a carbon atom to which four different species are attached is a chiral centre.
4. a compound whose molecules are achiral exhibits optical activity
Which of the statements given above are correct?
(a) 1,2 and 4
(b) 2,3 and 4
(c) 2 and 3
(d) 1 and 4

Alkendra Singh

Numerade Educator

Problem 118

The compound, whose stereochemical formula is shown below, exhibits A-geometrical isomers and B-optical isomers
The values of $\mathrm{A}$ and $\mathrm{B}$ are
(a) 4 and 4
(b) 4 and 2
(c) 2 and 4
(d) 2 and 2

Alkendra Singh

Numerade Educator

Problem 119

The correct statements about the compounds A, Band $\mathrm{C}$ are
(a) $\mathrm{A}$ and $\mathrm{B}$ are identical
(b) A and B are enantiomers
(c) A and C are enantiomers
(d) A and B are diastereomers

Alkendra Singh

Numerade Educator

Problem 120

Tautomerism is exhibited by which of the following compounds?
(a) 1,2 and 3
(b) 1 and 3
(c) 1 and 2
(d) $1,2,3$ and 4

Alkendra Singh

Numerade Educator

Problem 121

Which of the following compounds are chiral?
(a) 2 and 4
(b) 2 and 3
(c) 2,3 and 4
(d) Only 2

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 122

Match the following:
List I (Structure) $\quad$ List II (IUPAC name)
1. $\mathrm{CII}_{3}-\mathrm{CII}_{2}-\mathrm{CII}-\mathrm{CII}_{2}$
(i) 2 -methylprop-1-ene
The correct matching is:
$\begin{array}{llll}1 & 2 & 3 & 4\end{array}$
(a) (iii)
(ii) (iv) (i)
(b) (ii)
(iii) (i) (iv)
(c) (iii)
(iv) (ii) (i)
(d) (ii)
(iv) (i) (iii)

Hitendra Singh

Numerade Educator

Problem 123

Which of the following compound will exhibit optical isomerism?
(a) 1 and 3
(b) 1 and 2
(c) 1,2 and 4
(d) 1 only

Alkendra Singh

Numerade Educator

Problem 124

Which of the following have asymmetric carbon atoms?
1. $\mathrm{ClCH}_{2}-\mathrm{CH}_{2} \mathrm{Br}$
2. $\mathrm{CH}_{3}-\mathrm{CHCl}_{2}$
3. $\mathrm{CH}_{3}-\mathrm{CH} \mathrm{DCl}$
4. $\mathrm{CH}_{2} \mathrm{Br}-\mathrm{CHOH}-\mathrm{CH}_{3}$
(a) $1,2,3$
(b) $1,3,4$
(c) 2,3
(d) 3,4

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 125

Tautomerism is exhibited by
(a) 1 and 2
(b) 1,3 and 4
(c) 1,2 and 4
(d) $1,2,3$ and 4

Narayan Hari

Numerade Educator

Problem 126

Which of the following can exhibit geometrical isomerism?

Narayan Hari

Numerade Educator

Problem 127

Identify the correct statements
(a) The stereisomers which are not mirror images are diastereomers.
(b) Diasteteomers have the same physical properties like melting point and solubility
(c) Cis isomer has higher melting point and lower solubility than the corresponding trans isomer
(d) $\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{COCH}_{3}$ exists more in enolic form in gaseous phase or in $\mathrm{n}$ - hexane.

Narayan Hari

Numerade Educator

Problem 128

Which of the following is/are capable of showing geometrical isomerism?

Narayan Hari

Numerade Educator

Problem 129

Which of the following compounds is optically active?

Narayan Hari

Numerade Educator

Problem 130

For each category of compounds the minimum number of carbons required for optical isomerism to be possible is given. Find the correct match (es).
(a) Alkane - 7
(b) Alkene - 6
(c) Alkyl halide $-4$
(d) Alkadiene - 7

Narayan Hari

Numerade Educator

Problem 131

Which of the following are incorrect statements?
(a) IUPAC names of succinic acid is ethane 1, 2 -dicarbolxylic acid.
(b) Enantiomorphs possess identical biological properties.
(c) Tetrahydrofuran is a heteroaromatic compound
(d) Generally homologues are not isomers.

Narayan Hari

Numerade Educator

Problem 132

Tautomerism is exhibited by

Narayan Hari

Numerade Educator

Problem 133

Check the following compounds.

Narayan Hari

Numerade Educator

Problem 134

Which of the following can show geometrical isomerism ?
(a) But - 1 - ene
(b) But $-2$ - ene
(c) Hex $-3$ - ene
(d) 2 - Chlorobut $-2$ - ene

Ishu Khandelwal

Ishu Khandelwal

Numerade Educator

Problem 135

Keto-enol tautomerism is observed in
(a) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}$
(b) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO}$
(c) $\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CO}-\mathrm{CH}_{2}-\mathrm{CO}-\mathrm{CH}_{3}$

Narayan Hari

Numerade Educator

Problem 136

Which of the following stereocentres are in 'R' configuration?

Narayan Hari

Numerade Educator

Problem 137

Which of the following compounds can show tautomerism?

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 138

Consider the structures shown below :
And select the correct choice (s).
(a) (I) and (II) are geometrical isomer.
(b) (II) and (III) are homomers.
(c) (I) and (II) are enantiomers.
(d) (I) and (III) are enantimers.

Narayan Hari

Numerade Educator

Problem 139

A compound having molecular formula $\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}$ can show
(a) Functional isomerism
(b) Metamerism
(c) Position isomerism
(d) Optical isomerism

Shahina -

Numerade Educator

Problem 140

Which of the following does not exhibit tautomerism?

Raghvendra Singh

Raghvendra Singh

Numerade Educator

Problem 141

Which of the following compounds exists mainly in the enol form?

Narayan Hari

Numerade Educator

Problem 142

Enol content of $\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{2}-\mathrm{CO}-\mathrm{CH}_{3}$ will be
maximum in which of the solvents?
(a) Water
(b) $\mathrm{n}$ - hexane
(c) $\mathrm{CH}_{3}-\mathrm{COOH}$
(d) Aqueous $\mathrm{HCl}$

Narayan Hari

Numerade Educator

Problem 143

Following pair of structures represents
(a) pair of enantiomers
(b) pair of anomers
(c) pair of diastereomers
(d) all of the above

Narayan Hari

Numerade Educator

Problem 144

Select the pair of diastereomers out of the following
(a) $\mathrm{A}$ and $\mathrm{C}$
(b) $\mathrm{B}$ and $\mathrm{C}$
(c) $\mathrm{A}$ and $\mathrm{B}$
(d) both $\mathrm{A}$ and $\mathrm{C} . \mathrm{B}$ and $\mathrm{C}$

Narayan Hari

Numerade Educator

Problem 145

(A and B) is a pair of diastereomers

Narayan Hari

Numerade Educator

Problem 146

Match the following
(a) Enantiomers
(p) Equilibrium mixture
(b) Diastereomers
(q) Mirror images
(c) Meso isomer
(r) Non- mirror images
(d) Tautomers
(s) Non- superimposable
(t) Stereo isomer

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 147

Match the following
(a) $\mathrm{F}$ and $\mathrm{G}$ are
(p) Structural isomers
(b) $\mathrm{F}$ and $\mathrm{H}$ are
(q) tautomers
(c) $\mathrm{G}$ and $\mathrm{H}$ are
(r) geometrical isomers
(d) $\mathrm{E}$ and $\mathrm{F}$ are
(s) diastereomers
(t) chain isomers

Susan Hallstrom

Susan Hallstrom

Numerade Educator

Problem 148

Match the following

Hitendra Singh

Numerade Educator

Problem 149

Match the following Column-I
(a) $\mathrm{CH}_{3} \mathrm{CHDT}$
(b) $\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}(\mathrm{OH}) \mathrm{C}_{2} \mathrm{H}_{3}$
(c) $\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_{3}$
Column-II
(p) No optical isomer
(q) Two optical isomers
(r) Four optical isomers
(s) Three optical isomers
(t) Two asymmetric carbon atoms.

Ramesh Singh

Numerade Educator

Problem 150

Match the following

Hitendra Singh

Numerade Educator

Problem 151

(Assertion): The reaction of $\mathrm{HCN}$ with EtCH(Me) $\mathrm{C}^{13} \mathrm{HO}$ gives two optically active isomers in unequal amounts.
(Reason): Formation of cyanohydrins at $\mathrm{C}-13$ gives rise to $\mathrm{d}$ and 1 isomers.

Narayan Hari

Numerade Educator

Problem 152

(Assertion): All allenes are optically active.
Contains the terminal carbon groups in opposite planes.

Narayan Hari

Numerade Educator

Problem 153

(Assertion): An optically active molecule must be asymmetric.
(Reason): Asymmetric molecules will have nonsuperposable mirror image.

Narayan Hari

Numerade Educator

Problem 154

The total number of optically active isomers of the compound
$\mathrm{CH}_{2} \mathrm{OH}-\mathrm{CHBr}-\mathrm{CHOH}-\mathrm{CHBr}-\mathrm{CH}_{2} \mathrm{OH}$ is

Narayan Hari

Numerade Educator

Problem 155

The number of isomeric ethers corresponding to the formula $\mathrm{C}_{5} \mathrm{H}_{12} \mathrm{O}$ is

Vasu Makani

Numerade Educator

Problem 156

The molecular mass of a hydrocarbon is $70 .$ The number of possible acyclic structural isomers is

Alkendra Singh

Numerade Educator

Problem 157

The compound cyclises to form one amide linkage. The number of optical isomers for the cyclic product is

Narayan Hari

Numerade Educator

Problem 158

The number of stereoisomer formed by the given compound is

Narayan Hari

Numerade Educator

Problem 159

The number of compounds showing tautomerism is

John Nicolle

Numerade Educator

Problem 160

Number of mesoforms possible for the compound $\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHCl}-\mathrm{CHCl}-\mathrm{CHCl}-\mathrm{CHCl}-\mathrm{C}_{6} \mathrm{H}_{5}$ is

Narayan Hari

Numerade Educator

Problem 161

Give the total number of stereisomeric pairs present in the given compound 2,4 dibromo- 3 - hydroxyl -dioic acid.

David Collins

Numerade Educator

Problem 162

The number of geometrical isomers of the following alkene
$\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{Cl}$ is

Narayan Hari

Numerade Educator

Problem 163

Find out the total number of isomeric molecules form on dichlorination of cyclopentane/

Chloe Schroeder

Chloe Schroeder

Numerade Educator

Problem 164

What is the number of isomers possible that may have a benzene ring and a molecular formula $\mathrm{C}_{\gamma} \mathrm{H}_{9} \mathrm{~N} ?$

Vasu Makani

Numerade Educator

Problem 165

How many structural isomers are possible for monobromodichloro benzene?

Muhammad Bin

Numerade Educator

Problem 166

Underlined carbon is sp $^{3}$ hybridized in
(a) $\mathrm{CH}_{3} \mathrm{CH}=\underline{\mathrm{CH}}_{2}$
(b) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}$
(c) $\mathrm{CH}_{3} \mathrm{CONH}_{2}$
(d) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CN}$

Vasu Makani

Numerade Educator

Problem 167

The incorrect IUPAC name is
(a) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOC}_{2} \mathrm{H}_{5}$
ethyl butanoate
(b)
3-methyl butanal
(c)
2-methyl-3-pentanone
2-methyl-3-butanol

Hitendra Singh

Numerade Educator

Problem 168

Racemic mixture is formed by mixing two
(a) isomeric compounds
(b) chiral compounds
(c) meso compounds
(d) enantiomers with chiral carbon

Narayan Hari

Numerade Educator

Problem 169

A similarly between optical and geometrical isomerism is that
(a) if in a compound, one is present then so is the other.
(b) each forms equal number of isomers for a given compound
(c) both are included in stereoisomerism
(d) they have no similarly

Narayan Hari

Numerade Educator

Problem 170

Which of the following does not show geometrical isomerism?
(a) 1,1 -dichloro-1-pentene
(b) 1,2 -dichloro- 1 -pentene
(c) 1,3 -dichloro-1-pentene
(d) 1,4 -dichlroro-2-pentene

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 171

Following types of compounds are studied under which type of isomerism? $[\mathbf{2 0 0 2}]$
$\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3}$
(a) chain isomerism
(b) position isomerism
(c) conformers
(d) stereoisomerism

Narayan Hari

Numerade Educator

Problem 172

The IUPAC name of $\mathrm{CH}_{3} \mathrm{COCH}\left(\mathrm{CH}_{3}\right)_{2}$ is
(a) 4-methyl isopropyl ketone
(b) 3 -methylbutan-2-one
(c) isopropylmethyl ketone
(d) 2-methylbutan-3-one

Vasu Makani

Numerade Educator

Problem 173

Among the following four structures 1 to 4 [2003]
it is true that
(a) all four are chiral compounds
(b) only I and II are chiral compounds
(c) only III is a chiral compound
(d) only II and IV are chiral compounds

Narayan Hari

Numerade Educator

Problem 174

The IUPAC name of the following compound is [2004]
(a) 3,3 -dimethyl-1-hydroxycyclohexane
(b) 1,1 -dimethyl $-3$-hydroxycyclohexane
(c) 3,3 -dimethyl-1-cyclohexanol
(d) 1,1 -dimethyl-3-cyclohexanol.

Vasu Makani

Numerade Educator

Problem 175

Which one of the following does not have spª hybridized carbon?
(a) acetone
(b) acetic acid
(c) acetonitrile
(d) acetamide

Vasu Makani

Numerade Educator

Problem 176

Which of the following will have a meso isomer also?
(a) 2 -chlorobutane
(b) 2,3 -dichlorobutane
(c) 2,3 -dichloropentane
(d) 2 -hydroxypropanoic acid

Narayan Hari

Numerade Educator

Problem 177

Amongst the following compounds the optically active alkane having lowest molecular mass is $[\mathbf{2 0 0 4}]$
(a) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$
(b)
(c) 2 -cyclopropylbutane
(d) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{CH}$

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 178

For which of the following parameters of the structural isomers $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ and $\mathrm{CH}_{3} \mathrm{OCH}_{3}$ would be expected to have the same values? (Assume ideal behaviour)[2004]
(a) heat of vaporization
(b) vapour pressure at the same temperature
(c) boiling points
(d) gaseous densities at the same temperature and pressure

Narayan Hari

Numerade Educator

Problem 179

Of the five isomeric hexanes, the isomer which can give two monochlorination compound is [2005]
(a) n-hexane
(b) 2,3 -dimethylbutane
(c) 2,2 -dimethylbutane
(d) 2 -methylpentane

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 180

Which types of isomerism is shown by 2,3 -dichlorobutane? $\quad[2005]$
(a) diastereo
(b) optical
(c) geometric
(d) structural

Narayan Hari

Numerade Educator

Problem 181

Increasing order of stability among the three main conformations (eclipse, anti, gauche) of 2 - fluoroethanol is
(a) eclipse, gauche, anti
(b) gauche, eclipse, anti
(c) eclipse, anti, gauche
(d) anti, gauche, eclipse

Alkendra Singh

Numerade Educator

Problem 182

The IUPAC name of the compound shown below is [2006]
(a) 2 -bromo-6-chlorocyclohex-1-ene
(b) 6 -bromo-2-chlorocyclohexene
(c) 3 -bromo-1-chlorocyclohexene
(d) 1 -bromo-3-chlorocyclohexene

Vasu Makani

Numerade Educator

Problem 183

Which one of the following conformations of cyclohexane is chiral?
(a) rigid
(b) chair
(c) boat
(d) twist boat

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 184

The IUPAC name of
(a) 4,4 - dimethyl-5-diethyl pentane
(b) 5,5 -diethyl $-4,4$-dimethyl pentane
(c) 3 -ethyl $-4,4$-dimethyl heptane
(d) 1,1 -diethyl-2, 2 -dimethyl pentane

Vasu Makani

Numerade Educator

Problem 185

Which of the following molecules is expected to rotate the plane of plane polaized light?

Narayan Hari

Numerade Educator

Problem 186

The absolute configuration of
(a) $\mathrm{S}, \mathrm{S}$
(b) $\mathrm{R}, \mathrm{R}$
(c) $\mathrm{R}, \mathrm{S}$
(d) $\mathrm{S}, \mathrm{R}$

Narayan Hari

Numerade Educator

Problem 187

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
(a) $-\mathrm{COOH},-\mathrm{SO}_{3} \mathrm{H},-\mathrm{CONH}_{2},-\mathrm{CHO}$
(b) $-\mathrm{SO}_{3} \mathrm{H},-\mathrm{COOH},-\mathrm{CONH}_{2},-\mathrm{CHO}$
(c) $-\mathrm{CHO},-\mathrm{COOH},-\mathrm{SO}_{3} \mathrm{H},-\mathrm{CONH}_{2}$
(d) $-\mathrm{CONH}_{2},-\mathrm{CHO},-\mathrm{SO}_{3} \mathrm{H},-\mathrm{COOH}$

Dr. Satish Ingale

Dr. Satish Ingale

Numerade Educator

Problem 188

The IUPAC name of neopentane is:
(a) 2,2 - dimethylpropane
(b) 2-mehylpropane
(c) 2,2 - dimethylbutane
(d) 2 - methylbytane

Vasu Makani

Numerade Educator

Problem 189

The number of stereo isomers possible for a compound of the molecular formula [2009]
$\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}(\mathrm{OH})-\mathrm{Me}$ is:
(a) 2
(b) 4
(c) 6
(d) 3

Narayan Hari

Numerade Educator

Problem 190

Out of the following, the alkene that exhibits optical isomerism is
(a) 3 - methyl $-2$ - pentene
(b) 4 - methyl $-1$ - pentene
(c) 3 - methyl $-1$ - pentene
(d) 2 - methyl $-2$ - pentene

Vasu Makani

Numerade Educator

Problem 191

Identify the compound that exhibits tautomerism. [2011]
(a) Lactic acid
(b) 2 - Pentanone
(c) Phenol
(d) 2- Butene

Shahina -

Numerade Educator

Problem 192

How many chiral compounds are possible on monochlorination of 2 - methyl butane?
(a) 4
(b) 8
(c) 6
(d) 2

Alkendra Singh

Numerade Educator

Problem 193

The absolute configration of
(a) $\left(2^{\prime} \mathrm{S}^{\prime}, 3 \mathrm{R}\right)$
(b) $(2 \mathrm{R}, 3 \mathrm{R})$
(c) $(2 \mathrm{~S}, 3 \mathrm{~S})$
(d) $(2 R, 3 S)$

Nick Johnson

Numerade Educator