How many Faraday's of charge are required to reduce $1 \mathrm{mol}$ of ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$ to ${\mathrm{Cr}}^{+3}?$

Function of salt bridge is/are

a. It completes the cell circuit

b. It allows the movement of ions from one solution to other without mixing of the two solutions

c. It maintains the electrical neutrality of the solution in two half cells

What will be the emf of the cell in which the following reaction takes place at $298 \mathrm{K}?$

$\mathrm{Mn}\left(\mathrm{s}\right)+\underset{0.01\mathrm{M}}{{\mathrm{Cu}}^{2+}}\left(\mathrm{aq}\right)⟶\underset{0.0001\mathrm{M}}{{\mathrm{Mn}}^{2+}}\left(\mathrm{aq}\right)+\mathrm{Cu}\left(\mathrm{s}\right)$

(Given: ${\mathrm{E}}_{\mathrm{cell}}^0=1.52 \mathrm{V}$)