Assertion : Nitrating mixture used for carryi | vedclass

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(A) The nitrating mixture for benzene is a mixture of concentrated $HNO_3$ and concentrated $H_2SO_4$.In this mixture,$H_2SO_4$ acts as a strong acid

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) The nitrating mixture for benzene is a mixture of concentrated $HNO_3$ and concentrated $H_2SO_4$.In this mixture,$H_2SO_4$ acts as a strong acid and $HNO_3$ acts as a base.The reaction is: $HNO_3 + 2H_2SO_4 \rightleftharpoons NO_2^+ + H_3O^+ + 2HSO_4^-$.The electrophile $NO_2^+$ (nitronium ion) is generated,which then attacks the benzene ring.Thus,both the Assertion and the Reason are correct,and the Reason is the correct explanation of the Assertion.

Assertion : Nitrating mixture used for carrying out nitration of benzene consists of conc. $HNO_3 +$ conc. $H_2SO_4$.
Reason : In presence of $H_2SO_4$,$HNO_3$ acts as a base and produces $NO_2^+$ ions.

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Assertion : Nitrating mixture used for carrying out nitration of benzene consists of conc. $HNO_3 +$ conc. $H_2SO_4$.Reason : In presence of $H_2SO_4$,$HNO_3$ acts as a base and produces $NO_2^+$ ions.