Which of the following cells converts electrical energy into chemical energy?

Carnallite on electrolysis gives :

During an electrolysis experiment,a current of $100 \ mA$ is passed through a solution of $AgNO_3$ for $30 \ minutes$. Calculate the total charge in Coulombs used.

Electrolysis involves oxidation and reduction respectively at

The product obtained at the anode when $50 \%$ $H_2SO_4$ aqueous solution is electrolysed using platinum electrodes is:

Name the processes from which chlorine is obtained as a by-product. What will happen if an aqueous solution of $NaCl$ is subjected to electrolysis?