An organic compound A, having molecular formula C₄H₉Cl, reacts with sodium in dry diethyl ether to give a hydrocarbon.
This hydrocarbon on monochlorination gives only one chloro derivative.

Identify compound A.

1. t-Butyl chloride
2. sec. Butyl chloride
3. Iso butyl chloride
4. n-Butyl chloride

The reactivity order of halides for dehydrohalogenation is:

1. R–F > R–Cl > R–Br > R–I

2. R–I > R–Br > R–Cl > R–F

3. R–I > R–Cl > R–Br > R–F

4. R–F > R–I > R–Br > R–Cl

Given below is a reaction sequence:
\(\begin{aligned} & CH_3CH_2Cl\xrightarrow{NaCN}X\xrightarrow{H_2/Ni}Y\\ &Y\xrightarrow{\text{Acetic Anhydride}}Z \end{aligned}\)

Z in the above reaction is:

1. CH₃CH₂CH₂NHCOCH₃

2. CH₃CH₂CH₂NH₂

3. CH₃CH₂CH₂CONHCH₃

4. CH₃CH₂CH₂CONHCOCH₃

 \(CH_3CH_2CHCl_2\) upon reaction with \(NaNH_2\) gives:

1.		2.
3.		4.

The –OH group of an alcohol or the carboxylic acid can be replaced by – Cl using: 

Chloropicrin is obtained by the reaction of: 

1. Nitric acid on chlorobenzene.

2. Chlorine on picric acid.

3. Nitric acid on chloroform.

4. Steam on carbon tetrachloride.