Permanent hardness of water can be removed by (A) Boiling (B) Adding Ca(OH)2 (C) Boiling it with Na2CO3 (D) None of these

Permanent hardness of water can be removed by
(A) Boiling
(B) Adding Ca(OH)2
(C) Boiling it with Na2CO3
(D) None of these
by

1 Answer

Answer :

(C) Boiling it with Na2CO3
by

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Last Answer : bicarbonates of calcium and magnesium

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Which compounds are responsible for permanent hardness of water?

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Last Answer : Ans- Chlorides and sulphates of calcium and magnesium

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Which of the following is responsible for permanent hardness of water ? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate

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By which reason temporary and permanent hardness occur ?

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Last Answer : (C) Na2CO3 .10H2O