Which of the following compounds gives ethane upon electrolysis of its aqueous solution?

Which of the following substances is an electrolyte?

The best conductor of electricity is a $1.0 \, M$ solution of

$A$ reaction that takes place with the absorption of energy is

What happens to the $pH$ of the solution during the electrolysis of a dilute aqueous solution of $CuSO_4$ using inert electrodes?

Write the reactions for the following electrolytic processes:
$A$. Electrolytic reaction of concentrated aqueous solution of $NaCl$ (Brine).
$B$. Electrolytic reaction of dilute aqueous solution of $NaCl$.