Assertion: Sodium ions are discharged in preference to hydrogen ions at a mercury cathode. Reason: The nature of cathode can affect the order of discharge of cations.

Question

Assertion: Sodium ions are discharged in preference to hydrogen ions at a mercury cathode. Reason: The nature of cathode can affect the order of discharge of cations. (A) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion (B) If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion (C) If Assertion is true but the Reason is false (D) If both Assertion and Reason are false

Tardigrade Admin · Accepted Answer

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

Q. Assertion: Sodium ions are discharged in preference to hydrogen ions at a mercury cathode.
Reason: The nature of cathode can affect the order of discharge of cations.

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion

If Assertion is true but the Reason is false

If both Assertion and Reason are false

Hydrogen ions are discharged in preference to sodium normally but at mercury electrode, sodium ion are discharged first due to the formation of amalgam $(N a / H g)$ .

Q. Assertion: Sodium ions are discharged in preference to hydrogen ions at a mercury cathode. Reason: The nature of cathode can affect the order of discharge of cations.