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NEET NEET SOLVED PAPER 2016 Phase-I

  • question_answer
    Consider the nitration of benzene using mixed conc. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]and \[\text{HN}{{\text{O}}_{\text{3}}}\text{.}\]If a large amount of \[\text{KHS}{{\text{O}}_{\text{4}}}\]is added to the mixture, the rate of nitration will be:-                                                                    

    A)  faster                  

    B)  slower

    C)   unchanged                      

    D)   doubled

    Correct Answer: B

    Solution :

                     Slower, as large amount of \[\text{HS}{{\text{O}}_{4}}^{-}\]will decrease ionisation of \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] that result in lesser ionization of nitric acid and lesser formation of nitronium ion \[[N{{O}_{2}}^{+}]\]


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