The platinum electrodes were immersed in a solution of cupric sulphate and electric current was passed through the solution. After some time,it was found that the colour of copper sulphate disappeared with the evolution of gas at the electrode. The colourless solution contains:

$O_2$ gas will be evolved as a product of electrolysis of $:$
$(A)$ an aqueous solution of $AgNO_3$ using silver electrodes.
$(B)$ an aqueous solution of $AgNO_3$ using platinum electrodes.
$(C)$ a dilute solution of $H_2 SO_4$ using platinum electrodes.
$(D)$ a high concentration solution of $H_2 SO_4$ using platinum electrodes.
Choose the correct answer from the options given below $:$

The number of electrons involved in the reaction when $1 \ Faraday$ of electricity is passed through an electrolytic solution is?

Oxidation of species depends upon its oxidation potential. An oxidation reaction is possible for the species whose $E^{o}$ value is lower. Which of the following reactions occurs at the anode during the electrolysis of aqueous $NaCl$?

What will be the products obtained at cathode and anode respectively,on electrolysis of aqueous solution of $AgNO_3$ with platinum cathode and silver anode?

"Products obtained near the electrodes by electrolysis depend on the electrodes" - explain by suitable examples.