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JEE Main & Advanced Sample Paper JEE Main Sample Paper-40

  • question_answer
    Urea and hydrazine react to form ammonia gas along with compound X which reacts with aldehydes and ketones to form specific crystalline derivatives. X is

    A) phenyl hydrazine      

    B) semicarbazide

    C) biuret                          

    D) acetylurea

    Correct Answer: B

    Solution :

    \[N{{H}_{2}}CON{{H}_{2}}+N{{H}_{2}}-N{{H}_{2}}\xrightarrow[{}]{{}}\underset{(Semicarbazide)}{\mathop{N{{H}_{2}}NHCON{{H}_{2}}}}\,+N{{H}_{3}}\]


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