AIPMT 2002 Physics and Chemistry Paper

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Question : 80 of 100

Marks: +1, -0

In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3. The reason is :-

A thin layer of Ag is formed on Cu
More voltage is required
Ag+ions are completely removed from solution
Less availability of Ag+ions, as Cu can not displace Ag from [Ag(CN)2]−ion

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