JEE Main 2022 · 30 Jun · Shift 1 · Chemistry Q65

ChemistrySingle correct+4 / -1Question 65 of 90

In which of the following half cells, electrochemical reaction is pH dependent ?

\mathrm{Pt\,|\,Fe^{3+},Fe^{2+}}

\mathrm{MnO_4^-\,|\,Mn^{2+}}

\mathrm{Ag\,|\,AgCl\,|\,Cl^-}

\mathrm{\frac12F_2\,|\,F^-}

Answer and worked solution

Official answer: B

$\mathrm{MnO_4^-+8H^++5e^-\rightarrow Mn^{2+}+4H_2O}$ involves $\mathrm{H^+}$ .

(B)

Topics:Nernst equation

JEE Main 2022 · 30 Jun · Shift 1, Chemistry question 65