Solveeit Logo
Login

Question

Chemistry Question on Nernst Equation

Which one of the following reactions occur at the cathode?

A

2OH−→H2O+1/2O2+2e−2O{{H}^{-}}\xrightarrow{{}}{{H}_{2}}O+1/2{{O}_{2}}+2{{e}^{-}}

B

Ag→Ag++e−Ag\xrightarrow{{}}A{{g}^{+}}+{{e}^{-}}

C

Fe2+→Fe3++e−F{{e}^{2+}}\xrightarrow{{}}F{{e}^{3+}}+{{e}^{-}}

D

Cu2++2e−→CuC{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu

Answer

Cu2++2e−→CuC{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu

Explanation

Solution

At anode, oxidation takes place while at cathode reduction (ie, gain of electron) takes place. Thus, Cu2++2e−→CuC{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu occurs at cathode.