Question

why is the electrolysis of brine called chlor alkali process ?

Answer 1

because chlorine and sodium hydroxide are the products yielded when electrolysis of brine solution is done

Answer 2

In the mercury-cell process, also known as the Castner–Kellner process, a saturated brine solution floats on top of a thin layer of mercury. ... The mercury is recycled into the electrolytic cell. Chlorine is produced at the anode and evaporates out of the cell.