Question

Q16. The substance used for
removing permanent hardness of
water-
(a) Caoci,
O (b) NaHCO,
O (c) Na,Co,.10H,0
O (d) Cuso,​

Answer 1

Answer:

In this method, sodium aluminum ortho silicate known as permutit or zeolite is used to remove the permanent hardness of water.

Answer 2

Answer:

washing soda (Na2CO3.10H2O) removes permanent hardness of water