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Question

In the equation 4M+8CN+2H2O+O2 4[M(CN)2]+4OH
Identify metal M:


A


Copper

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B

Zinc

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C

Cadmium

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D

Gold

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Solution

The correct option is D

Gold


Above method is Mac-Arthur Forrest cyanide process which is used for extraction of metals like gold and silver


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