Reduction electrode potentials of half cells
(1) `Pt(H_(2))|H^(+)(C_(f)),(2)Pt(cl_(2))|(Cl^(-))(C_(2))` and (3) `Ag^(+)|Ag^(+)(C_(3))` on inc reasing `C_(1)C_(2)`, and `C_(3)` (all gases are at 1 atm pressure)

Options

A. will increase in all the three cases
B. will decrease in all the three cases
C. will increase in case (1) and (3) but decrease in case (2)
D. will decrease in case (1) and (3) but increase in case (2).

Answer

c

Explanation

Reduction potential in three cases are as follows:
(A) `H^(+)+e^(-)rarr(1)/(2)H_(2)`
On increasing `[H^(+)]E_(2)H+H_(2)` will increase
`(1)/(2)Cl_(2)+2e^(-)rarrCl^(-)`
On increasing `[Cl_(4)^(-)],E_(Cl_(2)//Ag)` will increase.