The species that contains only three pairs of electrons among the following is-

1.	Carbocation	2.	Carbanion
3.	Free radical	4.	None of the above

The increasing order of +ve I-effect shown by H, CH₃, C₂H₅ and C₃H₇ is-

1. H < CH₃ < C₂H₅ < C₃H₇

2. H> CH₃ <C₂H₅ > C₃H₇

3. H < C₂H₅ < CH₃ <C₃H₇

4. None of the above

The correct statement among the following is -

1. Allyl carbocation (CH₂=CH-CH₂⁺) is more stable than propyl carbocation

2. Propyl carbocation is more stable than allyl carbocation

3. Both are equally stable

4. None of the above

The pair of structures given below represent-
  

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.

A total number of structural isomeric aldehydes and ketones that can exist with
the molecular formula C₅H₁₀O are :
1. 5
2. 8
3. 6
4. 7
 

 Alkyl cyanide \(R-C \equiv N\) and alkyl isocyanides \(R- \overset{+}{N} \equiv C^-\) are: 

The optically active compound among the following is-

Glucose and fructose are-

The optically active compound among the following is-

1. Isobutyric acid

2. beta-Chloropropionic acid

3. Propionic acid

4. alpha-Chloropropionic acid