The production of an optically active compound from a symmetric molecule without resolution in termed as:

(1) Walden inversion

(2) partial racemisation

(3) asymmetric synthesis

(4) partial resolution

Buta-1,3-diene and But-2-yne are:

1. Position isomers

2. Functional isomers

3. Chain isomers

4. Tautomers

The number of different substitution products possible when ethane is allowed to react with Chlorine in sunlight are:

(1) 9

(2) 6

(3) 8

(4) 5

In butane, which of the following forms has the lowest energy?

(1) Gauche form

(2) Eclipsed form

(3) Staggered form

(4) None of these

The pair of structures given below represent-
  

In the following carbocations, the most stabile carbocation:

(1)  RCH₂C+H₃         

₍₂₎ 

₍₃₎                

 ₍₄₎ 

The number of optical isomers of pent-3-en-2-ol is:

1. 2             

2. 4

3. 8             

4. 16

The group named as benzal possesses .... nature.

(1) monovalent 

(2) bivalent

(3) trivalent

(4) tetravalent

Which of the following structures permits cis-trans isomerism?

1. X₂C=CY₂

2. XYC=CZ₂

3. X₂C=CXY

4. XYC=CXY

A compound contains 2 dissimilar asymmetric carbon atoms. The number of optically active isomers is

1. 2 

2. 3

3. 4

4. 5