Question

An aromatic amine (A) was treated with alcoholic potash and another compound Y when a foul smelling gas was formed with formula C₆H₅NC. Y was formed by reacting a compound Z with Cl₂ in presence of slaked lime. The compound Z is 

(a) C₆H₅NH₂

(b) CH₃OH 

(c) CH₃COCH₃ 

(d) CHCl₃

Answer 1

1. An aromatic amine (A) treated with alcoholic potash generates a foul-smelling gas with the formula C₆H₅NC. This indicates the formation of phenyl isocyanide (C₆H₅NC).

2. Another compound Y is formed by reacting a compound Z with Cl₂ in the presence of slaked lime. This reaction indicates the formation of an acyl chloride (also known as acid chloride) from the compound Z.

Based on these reactions and the options provided, the most suitable choice for compound Z is:

(c) CH₃COCH₃ (acetone)

Compound Z, acetone, can undergo chlorination in the presence of Cl₂ and slaked lime to form an acyl chloride. Subsequently, this acyl chloride reacts with an aromatic amine to produce a foul-smelling isocyanide.

Answer 2

(c) CH₃COCH₃