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10th Class Science Metals and Non-metals / धातु और अधातु Question Bank Metals and Non-metals

  • question_answer
    Which gas is evolved when copper is treated with dil. \[HN{{O}_{3}}\]?

    A) \[{{H}_{2}}\]                                     

    B) NO                       

    C) \[{{N}_{2}}O\]                                 

    D) \[{{N}_{2}}{{O}_{3}}\]

    Correct Answer: B

    Solution :

    When dil. \[HN{{O}_{3}}\] reacts with copper, cupric nitrate is formed and nitric oxide \[(NO)\] gas is evolved. \[3Cu+8HN{{O}_{3}}\to 3Cu{{(N{{O}_{3}})}_{2}}+2NO+4{{H}_{2}}O\]


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