Question

Assertion `(A):` The electrolysis of `NaCl` solution gives `H_(2)(g)` at cathode and `Cl_(2)(g)` at anode.
Reason `(R) : Cl_(2)` has higher oxidation potential than `H_(2)O`
A. If both `(A)` and `(R)` are correct, and `(R)` is the correct explanation of `(A)`.
B. If both `(A)` and `(R)` are correct, but `(R)` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R)` is incorrect.
D. If `(A)` is incorrect, `(R)` is correct.

Answer 1

Correct Answer - c
`(A)` is correct but `(R)` is incorrect.
Correct `(R) : Cl_(2)` has highter reduction potential than `H_(2)`, But has lower discharge potential on account of overpotential of `O_(2)`.
As a reference`:`
`i. Cl^(c-)(aq)rarr (1)/(2) Cl_(2)(g)+e^(-)` ,
`E^(c-)._(red)=1.36V or E^(c-)._(o x i d)=-1.36V`
`ii. 2H_(2)O(l) rarr 4H^(o+)(aq)+4e^(-) +O_(2)(g)`
`E^(c-)._(red)=1.23V or E^(c-)._(o x i d) =-1.23V`