Isomerism

Question 1

2 types of isomerism

Answer 1

Structural Isomerism

Stereomerism.

Question 2

5 types of structural isomerism

Answer 2

Chain 
Position 
Functional 
Metamerism 
Tautomrism

Question 3

3 types of stereomerism

Answer 3

Geometrical
Optical
Conformers

Question 4

What differs in chain isomers

Answer 4

Arrangement of chain like n pentane , iso pentane and neo pentane

Question 5

What differs in position isomers

Answer 5

Position of the functional group like 1-butanol and 2-butanol

Question 6

What differs in functional isomerism

Answer 6

Nature of functional group like functional isomers of alcohols are ethers, acid are esters , for aldehydes are ketones

Question 7

What differs in metamers

Answer 7

Nature of alkyl/ aryl group on both side of functional group.

Question 8

What causes tautomerism

Answer 8

Tautomerism is due to migration of H from C to adjacent O or N

Question 9

What’s a chiral carbon

Answer 9

A carbon atom with four different substituents

Question 10

The three dimensional arrangement of the groups attached to chiral carbon is called ?

Answer 10

Configuration

Question 11

Stereoisomers with an internal mirror plane are called ? compounds ? Are they chiral ?

Answer 11

Meso compounds. They are not chiral.

Question 12

What’s a racemic mixture ?

Answer 12

It’s a 50:50 mixture of enantiomers; such a mixture does not rotate plane polarised light even through it contains chiral substances

Question 13

Define enantiomers

Answer 13

Racemisation is a process whereby the absolute configuration of a chiral centre is converted to its mirror image configuration