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NEET Sample Paper NEET Sample Test Paper-87

  • question_answer
    In the diazotization 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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