Which of the following statements accurately describes the stability of allyl and propyl carbocations?

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.

What is the relationship between the two given molecular structures?

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:

Which of the following compounds is optically active?

1. Isobutyric acid

2. β-Chloropropionic acid

3. Propionic acid

4. α-Chloropropionic acid

The correct order of acidity among the following is:

1. CH₂=CH₂ >CH≡CH > CH₃C≡CH > CH₃-CH₃

2. CH≡CH > CH₃-C≡CH > CH₂=CH₂ >CH₃-CH₃

3. CH≡CH > CH₂=CH₂ > CH₃-C≡CH > CH₃-CH₃

4. CH₃-CH₃ > CH₂=CH₂ > CH₃-C≡CH > CH≡CH

The compound that gives the most stable carbonium ion after C- Cl bond ionisation among the following  is:

1.		2.
3.		4.