S-I: Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid
S-II: The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophile, nitronium ion.

Options

A. Both A and B are correct and R is the correct explanation of A
B. Both A and R are not correct
C. Both A and R are not correct
D. A is not correct but R is correct

Answer

a

Explanation

Both asserion and reason are correct and reason is the correct explantion of assertion. In nitration of benzene with nitric acid sulphuric acid acts as a calatyst . It helps in the formation of electrophile i.e., nitronium ion `NO_(2)^(+)` .
`HNO_(3)+H_(2)SO_(4)rarr NO_(2)^(+) +2HSO_(4)^(-)+H_(3)O^(+)`