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 number of geometrical isomers in case of a compound with the structure,

CH₃-CH=CH-CH=CH-C₂H₅ are:

1. Four                 

2. Three

3. Two                 

4. Five

Geometrical isomerism is caused by-

1. Restricted rotation around C=C bond.

2. The presence of one asymmetric carbon atom.

3. The different groups attached to the same functional group.

4. None of the above.

Which of the following is optically active?

1. Alanine

2. 2-butanol

3. Lactic acid

4. All of these

Lactic acid is:

1. propionic acid

2. β-hydroxypropanoic acid

3. α-hydroxypropanoic acid

4. none of the above

Benzaldoxime exists in how many forms?

1. 1

2. 2

3. 3

4. 4

Nitroethane can exhibit one of the following kind of isomerism:

1. metamerism             

2. optical activity

3. tautomerism             

4. position isomerism

Number of possible isomers of glucose are:

1. 10

2. 14

3. 16

4. 20

Isomerism among compounds due to migration of a proton is known as:

1. Geometrical       

2. Optical

3. Tautomerism       

4. Position