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Q.

Statement - I : Sodium ions are discharged in preference to hydrogen ions at a mercury electrode.
Statement - II : The nature of cathode can affect the order of discharge of cations.

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a

Both statements I and II are correct

b

Statement-I is incorrect and statement-II is correct

c

Both statements I and II are incorrect

d

Statement-I is correct and statement-II is incorrect

answer is A.

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Detailed Solution

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Hydrogen ions are discharged in preference to sodium normally but at mercury electrode, Sodium ions are discharged first due to the formation of amalgam (Na/Hg).

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