During the electrolysis of aqueous $NaCl$ using platinum electrodes,which product is formed at the cathode?

Give the electrolytic reactions of molten $NaCl$ occurring at inert electrodes.

$KOOC-CH_2-CH_2-COOK \xrightarrow{\text{electrolysis}} (A) (\text{major})$. Product $(A)$ is:

What is a rectifier?

Assertion : $A$ small amount of acid or alkali is added before electrolysis of water.
Reason : Pure water is a weak electrolyte.

Write the reactions for the following processes:
$A$. Electrolysis of water at the anode and cathode.
$B$. Electrolytic reaction of molten $NaCl$.