question_answer

Consider the following reaction,   \[RX+{{H}_{2}}\xrightarrow[{}]{{}}RH+HX\]the product, Z, is

A) toluene                               

B) benzaldehyde  

C) benzoic acid   

D)        benzene

Correct Answer: C

Solution :

Key Idea (i) Zn dust converts ?OH group into ?H. (ii) Reaction with \[RX+{{H}_{2}}\xrightarrow[{}]{{}}RH+HX\] in presence of anhy. \[RX+Mg\xrightarrow[{}]{{}}RMgX\] is called Friedel?Craft's alkylation. (iii) Alkaline \[\text{mo}{{\text{l}}^{\text{-1}}}\] converts complete carbon chain which is directly attached with benzene ring, into -COOH group.