Organic Compounds Containing Halogens Question 173

Question: Analyse the following reaction and identify the nature of $ A $ and $ B $ [Kerala CET 2005] $ B\underset{hv}{\mathop{\xleftarrow{HBr}}} $ $ \xrightarrow{HBr}A $

Options:

A) Both A and B are

B) Both A and B are

C) A is & B is

D) A is & B is

E) A is & B is

Show Answer

Answer:

Correct Answer: C

Solution:

$ \xrightarrow{HBr}A $ Formation of A is a electrophilic addition reaction (i) $ HBr\to {H^{+}}+B{r^{-}} $ (ii) $ +{H^{+}}\to \overset{+}{\mathop{C_6H_5CHCH_3}} $

$ \underset{hv}{\mathop{\xrightarrow{HBr}}}B $ Formation of B is a free radical addition reaction (i) $ HBr\xrightarrow{hv}\overset{\bullet }{\mathop{H}}+\overset{\bullet }{\mathop{Br}} $ (ii) (iii)