Chemistry · Hydrogen and Water
Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of soluble salts of magnesium and calcium in the form of:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Carbonates of alkali metals
- 2Hydrogen carbonates only
- 3Bicarbonates and carbonates
- 4Chlorides and sulphates✓
Correct answer
Chlorides and sulphates
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