A) Hg, Pt and graphite
B) Na, S and Hg
C) Pt and graphite only
D) Na and S only
Correct Answer: A
Solution :
Hg (mercury), Pt and graphite can be used as electrodes in the electrolytic cell having aqueous solution as they are inert towards water. Sodium and sulphur react with water, hence, cannot be used.
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