The radical  is aromatic because it has:

1. 6 p-orbitals and 6 \(\pi\) electrons

2. 7 p-orbitals and 6 \(\pi\) electrons

3. 7 p-orbitals and 7 \(\pi\) electrons

4. 6 p-orbitals and 7 \(\pi\) electrons

Which of the following does not exhibit optical isomerism?

(1) Maleic acid      

(2) α-amino acids

(3) Lactic acid       

(4) Tartaric acid

Which one of the following is most reactive towards electrophilic reagent?

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by:-

1. Oxidation
2. Cracking
3. Distillation under reduced pressure
4. Hydrolysis

Which one of the following has the most acidic nature?

1.		2.
3.		4.

The stability of the carbanions in the following is in the order:

(1)		(2)
(3)		(4)

1.  (1)>(2)>(3)>(4)

2.  (2)>(3)>(4)>(1)

3.  (4)>(2)>(3)>(1)

4.  (1)>(3)>(2)>(4)

The IUPAC name of is

(a) 3, 4-dimethylpentanoyl chloride

(b) 1-chloro-1-oxo-2, 3-dimethylpentane

(c) 2-ethyl-3-methylbutanoyl chloride

(d) 2, 3-dimethylpentanoyl chloride

Boiling the Lassaigne’s extract with concentrated HNO₃ during halogen testing is done to:

1. Remove interfering CN⁻ and S²⁻ ions by oxidising them

2. Facilitates the precipitation of AgCl

3. Increases the solubility product of AgCl

4. Increases the concentration of NO₃⁻ ions

Ether and benzene can be separated by:
1. Filtration
2. Distillation
3. Crystallization
4. Sublimation

The molecule among the following having the highest reactivity toward the SN¹ reaction is:

1. C₆H₅CH(C₆H₅)Br

2. C₆H₅CH(CH₃)Br

3. C₆H₅C(CH₃)(C₆H₅)Br

4. C₆H₅CH₂Br