The charge carried by 1 millimole of Mⁿ⁺ ions is 193 coulombs. The value of n is

If electrolysis of aqueous CuSO₄ solution is carried out using Cu-electrodes, the reaction taking place at the anode is

What amount of electricity can deposit 1 mole of Al metal at cathode when passed through molten AlCl₃ ?

Given the standard half-cell potentials (E$$^\circ$$) of the following as

$$\matrix{ {Zn \to Z{n^{2 + }} + 2{e^ - };} & {{E^o} = + 0.76V} \cr {Fe \to F{e^{2 + }} + 2{e^ - };} & {{E^o} = 0.41V} \cr } $$

Then the standard e.m.f. of the cell with the reaction $$F{e^{2 + }} + Zn \to Z{n^{2 + }} + Fe$$ is