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Unit - 8.2 Water of Crystallisation and Reaction of metals with Water — CHEMISTRY STD 8 — Question

ICSE BoardEnglish MediumSTD 8CHEMISTRYUnit - 8.2 Water of Crystallisation and Reaction of metals with Water1 Mark
Question
Define the following terms:
(d) Permanent hard water
✓

Answer

Hard water contains soluble salts of calcium and magnesium that are present in the form of sulfides, nitrates, or chlorides are called permanent hardness of the water.

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