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J & K CET Engineering J and K - CET Engineering Solved Paper-2004

  • question_answer
    In the equation \[4M+8C{{N}^{-}}+2{{H}_{2}}O+{{O}_{2}}\xrightarrow{{}}4{{[M{{(CN)}_{2}}]}^{-}}\] \[+\,4\,O{{H}^{-}}\] Identify the metal M.

    A)  copper       

    B)  iron

    C)  silver          

    D)  zinc

    Correct Answer: C

    Solution :

     \[4Ag+8C{{N}^{-}}+2{{H}_{2}}O+{{O}_{2}}\xrightarrow{{}}4{{[Ag{{(CN)}_{2}}]}^{-}}\] \[+\,4O{{H}^{-}}\] This process is called cyanide process. It is used in the extraction of silver from argentite \[(A{{g}_{2}}S)\]


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