question_answer

The relationship between acetylene and benzene can be compared with the relationship of propyne with:

A)  xylene                

B)         neoprene          

C)         mesitylene     

D)         propyl benzene

Correct Answer: C

Solution :

Benzene is obtained by polymerisation of acetylene. \[3CH\equiv \equiv CH\xrightarrow{Fe,\,\Delta }\underset{\text{Benzene}}{\mathop{{{C}_{6}}{{H}_{6}}}}\,\] Similarly, propyne on polymerisation, yields mesitylene (trimethyl benzene).