The number of electrons passing per second through a cross-section of copper wire carrying $10^{-6} \ A$ of current is found to be:

Electrolysis of concentrated aqueous solution of $NaCl$ results in

Electrolytes can conduct electricity because

Given below are two statements $:$
$1 \ M$ aqueous solution of each of $Cu(NO_3)_2, AgNO_3, Hg_2(NO_3)_2$ and $Mg(NO_3)_2$ are electrolysed using inert electrodes.
Given $: E_{Ag^{+}/Ag}^{\theta} = 0.80 \ V, E_{Hg_2^{2+}/Hg}^{\theta} = 0.79 \ V, E_{Cu^{2+}/Cu}^{\theta} = 0.24 \ V$ and $E_{Mg^{2+}/Mg}^{\theta} = -2.37 \ V$.
Statement $(I) :$ With increasing voltage,the sequence of deposition of metals on the cathode will be $Ag, Hg$ and $Cu$.
Statement $(II) :$ Magnesium will not be deposited at cathode instead oxygen gas will be evolved at the cathode.
In the light of the above statement,choose the most appropriate answer from the options given below.

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

Which of the following is produced by the electrolysis of $NaCl$?