2. Solved Papers
  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2009

  • question_answer
    The metal which gives \[{{H}_{2}}\] on treatment with acid as well as NaOH is

    A)  Fe             

    B)  Cu

    C)  Zn             

    D)  Hg

    Correct Answer: C

    Solution :

    Zinc (Zn) being a moderately reactive metal, gives \[{{H}_{2}}\] with acids as well as \[NaOH\]. \[Zn+2HCl\xrightarrow{{}}ZnC{{l}_{2}}+{{H}_{2}}\] \[Zn+NaOH\xrightarrow{{}}\underset{sodium\text{ }zincate}{\mathop{N{{a}_{2}}Zn{{O}_{2}}}}\,+{{H}_{2}}\]


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