Electrolytic Cells and Electrolysis

On electrolysis of an aqueous solution of $\mathrm{NaCl}$, the products released at cathode and anode are, respectively

Copper sulphate solution (250 mL) was electrolysed using a platinum anode and a copper cathode. A constant current of 2 mA was passed for 16 minutes. It was found that after electrolysis the absorbance of the solution was reduced to 50% of its original value. The concentration of copper sulphate in the solution at the beginning would be:

Electrolysis of a solution of $MnS{O}_4$ in aqueous sulphuric acid is a method for the preparation of $Mn{O}_2$ as per the reaction:

${\text{Mn}}_{\text{aq}}^{2+}+2{\text{H}}_2\text{O}⟶{\text{MnO}}_{2\left(\text{s}\right)}+2{\text{H}}_{\left(\text{aq}\right)}^{+}+{\text{H}}_{2\left(\text{g}\right)}$

Passing a current of 27 A for 24 hours gives only 1 kg of $Mn{O}_2.$ The value of current efficiency would be: $\left({\text{M}}_{{\text{MnO}}_2}=86.9\text{g}\right)$

In the electrolytic cell, flow of electrons is from:

The product, which is not obtained during the electrolysis of brine solution is

Which of the following is not obtained on electrolysis of brine solution ?

Faraday's of electricity required to reduce 1 mole of ${\mathrm{MnO}}_4^{-}$ ions to ${\mathrm{Mn}}^{2+}$:

Electrolysis of concentrated aqueous solution of $\mathrm{NaCl}$ results in

In the electrolysis of molten ${\mathrm{Al}}_2{\mathrm{O}}_3$ with inert electrodes

Which of the following is an incorrect statement:

Based on the cell representation for a spontaneous reaction, at the anode:

$Ag\left(\mathrm{s}\right)|AgCl(\mathrm{s}\left)\right|{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right)\Vert {\mathrm{Br}}^{-}\left(\mathrm{aq}\right)\left|{\mathrm{Br}}_2\left(\ell \right)\right|\mathrm{C}\left(\mathrm{s}\right)$

In the electrolytic refining of copper, $\mathrm{Ag}$ and $\mathrm{Au}$ are found :-

The highly efficient method of obtaining beryllium is :

Describe the role of cryolite in the electrometallurgy of aluminum.
 

In the electrolysis of aqueous sodium chloride solution which of the half cell reaction will occur at anode?

Write short notes on-

Electrometallurgy

Electrochemical process (electrolysis of fused salt) is used to extract: