1.

In the equation\[4M+8C{{N}^{-}}+2{{H}_{2}}O+{{O}_{2}}\to \]\[4{{[M{{\left( CN \right)}_{2}}]}^{-}}+4O{{H}^{-}}\]Identify the metalM. It is

A. copper
B. iron
C. gold
D. zinc
Answer» D. zinc


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