1.

Assertion : Electrolysis of NaCl solution gives chlorine at anode instead of O_(2). Reason: Formation of oxygen at anode requires over voltage.

Answer»

Both assertion and REASON are true and the reason is the correct explanation of assertion.
Both assertion and reason are true and the reason is not the correct explanation of assertion.
Assertion is true but the reason is false.
Both assertion and reason are false.

Solution :At the anode, the following oxidation reactions are possible.
`Cl_((aq))^(-) to (1)/(2) Cl_(2(g))+e^(-),E_(CELL)^(THETA)=1.36V`. . (Oxidation)
`H_(2)O_((l)) to (1)/(2)O_(2(g))+4H_((aq))^(+)+4e^(-) , E_(cell)^(Theta)=1.23V` . . (Oxidation)
* Lower value of `E_(cell)` is preferred but due to over voltage CHLORINE is liberated at anode.


Discussion

No Comment Found

Related InterviewSolutions