$1 \ C$ of electricity deposits:

In electroplating,which of the following metals is generally not used for plating?

$NaOH$ is manufactured by the electrolysis of a brine solution. The products of the reaction are:

On electrolysis of aqueous solution of $KI$ in the presence of platinum electrodes,which of the following statements are correct?
$(a)$ Hydrogen gas is released at the cathode.
$(b)$ Oxygen gas is released at the anode.
$(c)$ $pOH$ of the solution decreases.
$(d)$ There is deposition of potassium at the cathode.

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.

If the passage of current liberates $H_2$ at cathode and $Cl_2$ at anode then the solution is