question_answer

The compound, with which ethanal does not react, is

A)  \[HCl\]          

B)  \[C{{l}_{2}}\]

C)  \[PC{{l}_{5}}\]          

D)  aq \[NaHS{{O}_{3}}\]

Correct Answer: A

Solution :

 \[HCl\]is a strong inorganic acid, hence it does not react with ethanal whereas with other given reagents, it reacts in the following manner: \[\underset{ethanal}{\mathop{C{{H}_{3}}CHO}}\,+C{{l}_{2}}\xrightarrow[{}]{{}}\underset{chloral}{\mathop{CC{{l}_{3}}CHO}}\,\] \[C{{H}_{3}}CHO+PC{{l}_{5}}\xrightarrow[{}]{{}}C{{H}_{3}}CHC{{l}_{2}}\] \[C{{H}_{3}}CHO+HCl\xrightarrow[{}]{{}}No\text{ }reaction.\]