Isomerism Test

Result

Isomerism Test - 3

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Weekly Quiz Competition

Question 1
4 / -1

Disymmetric object is one which is?

A
Superimposable on its mirror image

B
Non-superimposible on its mirror image

C
Optically inactive

D
Achiral

Solution

Non superimposible on its mirror image.
Question 2
4 / -1

Optically active compound is:

A
3-chloropentane

B
2-chlorobutane

C
2-chloropropane

D
None of these

Solution

2-chloro butane will be optically active
Question 3
4 / -1

Which of the following pairs of compounds are enantiomers?

A

B

C

D

Solution

Structures are mirror images of each other which are non super impossible so they are enantiomers.
Question 4
4 / -1

An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be:

A
Optically active mixture

B
Pure enantiomer

C
Meso compound

D
Racemic mixture

Solution

Both have one chiral carbon atom hence racemic mixture will be obtain
Question 5
4 / -1

Isomerism shown by

A
Position isomerism

B
Chain isomerism

C
Metamerism

D
Optical isomerism

Solution

Metamerism is shown by the different arrangement of alkyl group about functional group.
Question 6
4 / -1

Dimethyl ether and ethyl alcohol are:

A
Metamers

B
Homologues

C
Functional isomers

D
Position isomers

Solution
Question 7
4 / -1

For which of the following parameters the structural isomers C₂H₅OH and CH₃OCH₃ would be expected to have the same values? (Assume ideal behaviour)

A
Boiling points

B
Vapour pressure at the same temperature

C
Heat of vaporization

D
Gaseous densities at the same temperature and pressure

Solution

Gaseous density of both ethanol and dimethyl ether would be same under identical condition of temperature and pressure while the rest of these three properties vapour pressure, boiling point and heat of vaporization will differ as ethanol has hydrogen bonding where as ether does not.
Question 8
4 / -1

Among the following the most stable compound is:

A
cis 1,2 cyclohexanediol

B
trans 1,2 cyclohexanediol

C
cis 1,3 cyclohexanediol

D
trans 1,3 cyclohexanediol

Solution

Trans configuration is more stable than cis configuration because in cis-configuration the H groups are thrown closely enough together to cause crowding or repulsion. Again between 1,2-and 1,3-configurations, in 1- 3, the OH groups are placed further apart to minimise the repulsion.
Question 9
4 / -1

Chirality of carbon compound is because of its:

A
Tetrahedral nature of carbon

B
Monovalent nature of carbon

C
Divalent nature of carbon

D
Trivalent nature of carbon

Solution

Chirality of carbon compound is because of its tetrahedral nature of carbon.
Question 10
4 / -1

Which one of the following is an optically active compound?

A
n-propanol

B
2-chlorobutane

C
n-butanol

D
4-hydroxyheptane

Solution

because they contain chiral carbon atom.