Local action in an electrochemical action can be prevented byA. using by pure electrolytes in tw half cellsB. using very pure metal for anodeC. coating zinc anode with mercuryD. using pure graphite for cathode.

Local action in an electrochemical action can be prevented byA. using

1.	Local action in an electrochemical action can be prevented byA. using by pure electrolytes in tw half cellsB. using very pure metal for anodeC. coating zinc anode with mercuryD. using pure graphite for cathode.
Answer» Correct Answer - B,C Local action leads to the eating away of the metal used as anode in an electrochemical cell. It is due to the presence of impurities in the metal used for making anode. These impurities help in setting up of tiny electrochemical reaction cells on the surface of anode which results in the eating away of the metal . it can be prevented by using very pure metals for anode or by coaing the zinc anode with mercury.

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Local action in an electrochemical action can be prevented byA. using by pure electrolytes in tw half cellsB. using very pure metal for anodeC. coating zinc anode with mercuryD. using pure graphite for cathode.

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