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Electrolysis and Electrolytes

If mercury is...

Question

If mercury is used as cathode in the electrolysis of $N a C l$ solution, the ions discharged at cathode are:

A

H^{+}

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B

N a^{+}

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C

O H^{-}

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D

C l^{-}

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Solution

The correct option is B $N a^{+}$
If mercury is used as cathode in the electrolysis of $N a C l$ solution, the ions discharged at cathode are ${N a}^{+}$

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Q. If mercury is used as cathode in the electrolysis of aqueous NaCl solution ,the ion discharged at cathode is?

Q. Assertion (A): In the electrolysis of aqueous NaCl, Na is preferentially discharged at the mercury cathode forming sodium amalgam.
Reason (R) : It is due to the fact that hydrogen has a high over voltage at mercury cathode.

Q. Assertion :Sodium ions are discharged at a mercury cathode in preference to hydrogen ion. Reason:

N a^{+}

is stronger reducing agent than

H^{+}

.

Q. Select the correct answer from the list given in brackets:
The ion which is discharged at the anode during the electrolysis of copper sulphate solutions using copper electrodes as anode and cathode.

[C u^{2 +}, O H^{-}, S O_{4}^{2 -}, H^{+}]

Q. During the electrolysis of an aqueous solution

N a C l

, hydrogen ion is reduced at the cathode and not the sodium ion through both

N a^{+}

H^{+}

ions are present inn the solution, why?

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