JEE Main & Advanced Chemistry The d-and f-Block Elements Question Bank Compounds of Transitional Elements

  • question_answer Zn gives hydrogen gas with \[{{H}_{2}}S{{O}_{4}}\]and \[HCl\] but not with \[HN{{O}_{3}}\] because [CBSE PMT 2002]

    A) \[N{{O}_{2}}\]is reduced in preference to \[{{H}_{3}}{{O}^{+}}\]

    B) \[HN{{O}_{3}}\]is weaker acid than \[{{H}_{2}}S{{O}_{4}}\] and \[HCl\]

    C) \[Zn\]acts as oxidising agent when reacts with \[HN{{O}_{3}}\]

    D) In electrochemical series \[Zn\]is placed above the hydrogen

    Correct Answer: B

    Solution :

    \[4Zn+10HN{{O}_{3}}\to 4Z{{(N{{O}_{3}})}_{2}}+N{{H}_{4}}N{{O}_{3}}+3{{H}_{2}}O\]

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