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JEE Main & Advanced JEE Main Paper (Held on 12-4-2019 Morning)

  • question_answer
    The metal that gives hydrogen gas upon treatment with both acid as well as base is : [JEE Main Held on 12-4-2019 Morning]

    A) zinc

    B) iron

    C) magnesium                 

    D) mercury

    Correct Answer: A

    Solution :

    \[Zn+2HCl\to ZnC{{l}_{2}}+{{H}_{2}}\uparrow \]           \[Zn+2NaOH\to N{{a}_{2}}Zn{{O}_{2}}+{{H}_{2}}\uparrow \]              


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