Question

Cause of permanent hardness of water .....Only right ans. No time pass .....**♡☆☆♡☆

Answer 1

Permanent hardness in water ishardness due to the presence of the chlorides, nitrates and sulphates of calcium and magnesium, which will not be precipitated by boiling. The lime scale can build up on the inside of the pipe restricting the flow of water orcausing a blockage.

Answer 2

over using of ground water. No restrictions laid government to dig bore well.old laws are implementing now also about ground water