Question

why the chloride ions in sample borewell water are more than river water​

Answer 1

Chloride increases the electrical conductivity of water and thus increases its corrosivity. In metal pipes, chloride reacts with metal ions to form soluble salts (8), thus increasing levels of metals in drinking-water.

Answer 2

Answer:

Chloride increases the electrical conductivity of water and thus increases its corrosivity.

In metal pipes, chloride reacts with metal ions to form soluble salts (8), thus increasing levels of metals in drinking-water.