Electrolysis of molten anhydrous calcium chloride produces

Which of the following is released at the cathode during the electrolysis of aqueous sodium chloride?

In electrolysis of aqueous $NaOH$ at $NTP$,$2.8 \ L$ of oxygen gas is liberated at the anode. The amount of gas liberated at the cathode will be ............ $L$.

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

What will be the $pH$ of the aqueous solution of the electrolyte in an electrolytic cell during the electrolysis of $CuSO_{4(aq)}$ between graphite electrodes?

Explain: Oxidation of $Cl^{-}$ ion is carried out near the anode when electrolysis of aqueous (concentrated) $NaCl$ solution is carried out using an inert electrode.