question_answer

An aromatic amine A was treated with alcoholic potash and another compound Y when foul smelling gas was formed with formula \[{{C}_{6}}{{H}_{5}}NC.\] Y was formed by reacting a compound Z with \[C{{l}_{2}}\] in the presence of slaked lime. The compound Z is          [CBSE PMT 1990]

A)                 \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\]               

B)                 \[{{C}_{2}}{{H}_{5}}OH\]

C)                 \[C{{H}_{3}}OC{{H}_{3}}\]           

D)                 \[CHC{{l}_{3}}\]

Correct Answer: B

Solution :

                                 \[\underset{(Z)}{\mathop{{{C}_{2}}{{H}_{5}}OH+C{{l}_{2}}}}\,\xrightarrow{Ca{{(OH)}_{2}}}\underset{\text{Acetaldehyde}}{\mathop{C{{H}_{3}}CHO}}\,\xrightarrow{C{{l}_{2}}}\]\[\underset{\text{Chloral}}{\mathop{CC{{l}_{3}}CHO}}\,\xrightarrow{Ca{{(OH)}_{2}}}\underset{(Y)}{\mathop{\underset{\text{chloroform}}{\mathop{CHC{{l}_{3}}}}\,}}\,\]