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Chemistry
Which of the substance, Na, Hg, S, Pt and graphite, can be used as electrodes in electrolytic cells having aqueous solution?
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Q. Which of the substance, Na, Hg, S, Pt and graphite, can be used as electrodes in electrolytic cells having aqueous solution?
JIPMER
JIPMER 1996
A
Hg, Pt and graphite
B
Na, S and Hg
C
Pt and graphite only
D
Na and S only
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.