Q63 of 76 Page 272

The process of purification of an impure metal is like:

The process of purification of an impure metal is like electroplating a metal on the same type of metal. The pure metal is removed and deposited on the pure metal.

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61

Which of the following can be electroplated with chromium ?

A) Bakelite B) Graphite


C) Steel D) Teflon

 62

In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be:

 64

The device which can be used to detect very small current flowing in an electric circuit is:

 65

If plus sign (+) denotes the positive electrode and minus sign (-) denotes the negative electrode, then which of the following statement is correct for an iron spoon to be copper-plated ?