J & K CET Engineering J and K - CET Engineering Solved Paper-2008

  • question_answer
    Metallic silver may be obtained from \[\text{AgCl}\]by

    A)  heating it in the current of \[{{\text{H}}_{\text{2}}}\]

    B)  fusing it with sand

    C)  treating with carbon monoxide

    D)  fusing it with \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]

    Correct Answer: D

    Solution :

     On fusing \[\text{AgCl}\]with \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\text{,}\]metallic silver is obtained. \[2AgCl+N{{a}_{2}}C{{O}_{3}}\xrightarrow{\text{Fuse}}\underset{\begin{smallmatrix}  \text{metallic} \\  \,\,\,\text{sliver} \end{smallmatrix}}{\mathop{2Ag\downarrow }}\,+2NaCl\] \[+\,C{{O}_{2}}+\frac{1}{2}{{O}_{2}}\]


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