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JEE Main & Advanced Chemistry Nitrogen Containing Compounds Question Bank Self Evaluation Test - Amines

  • question_answer
    In the diazotisation of arylamines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to

    A) supress the concentration of free aniline available for coupling

    B) supress hydrolysis of phenol

    C) ensure a stoichiometric amount of nitrous acid

    D) neutralise the base liberated

    Correct Answer: A

    Solution :

    [a] Excess of \[HCl\] is used to convert free aniline to aniline hydrochloride otherwise free aniline would undergo coupling reaction with benzenediazonium chloride.


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