Question

The reduction potential of hydrogen half cell will be negative if $(T=298 K )$ :

(A) $P_{ H _{2}}=1 atm$ and $\left[ H ^{+}\right]=1.0 M$

(B) $P_{ H _{2}}=2 atm$ and $\left[ H ^{+}\right]=2.0 M$

(C) $P _{ H _{2}}=2 atm$ and $\left[ H ^{+}\right]=1.0 M$

(D) $P_{ H _{2}}=1 atm$ and $\left[ H ^{+}\right]=2.0 M$

Answer 1

The reduction potential of hydrogen half cell will be negative if $P _{ H _{2}}$= 2 atm and $\left[ H ^{+}\right]$= 1.0 M.

So, The correct option of this question is (C).