Question

The salt responsible for permanent hardness of water is :
A. Na2SO4
B. Mg(HCO3)2
C NaCl
D. MgCl2​

Answer 1

$\huge\blue{\boxed{\underline{ANSWER}}}$

• The salt responsible for permanent hardness of water is Mg(HCO3)2.

Answer 2

Answer:

(D)MgCl2 is the answer.