1.

Name the metal M which is extracted on the basis of following reactions 4M+8CN^(-)+2H_2O+O_2to4[M(CN)_2]^(-)+4OH^-2[M(CN)_2]^(-)+Znto[Zn(CN)_4]^(2-)+2M:

Answer»

Nickel
Silver
Copper
Mercury

Answer :B


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