Which of the following materials from $Na, Hg, S, Pt,$ and graphite are used as electrodes in electrolytic cells containing aqueous solutions?

During the electrolysis of molten $NaCl$, some water was added. What will happen?

Two statements are given below.
Statement $I$ : Molten $NaCl$ is electrolysed using $Pt$ electrodes. $Cl_2$ is liberated at anode.
Statement $II$ : Aqueous $CuSO_4$ is electrolysed using $Pt$ electrodes. $O_2$ is liberated at cathode.
The correct answer is

If an electric current is passed through an electrolyte solution,what happens to the ions?

The electrolysis of a certain liquid resulted in the formation of hydrogen at the cathode and chlorine at the anode. The liquid is

How many moles of electrons are required for the reduction of $1 \ mole$ of $Cr^{3+}$ to $Cr_{(s)}$?