(A) calcium bicarbonate (X)
(B) magnesium bicarbonate (X)
(C) calcium sulphate ()
(D) sodium bicarbonate (X)
Answers: Permanent hardness of water is due to the presence of calcium sulphate.
(A) calcium bicarbonate (X)
(B) magnesium bicarbonate (X)
(C) calcium sulphate ()
(D) sodium bicarbonate (X)
Answers: Permanent hardness of water is due to the presence of calcium sulphate.
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