Q. 1 D4.4( 21 Votes )

The salt that cau

Answer :

Hard water generally contains magnesium and calcium


bicarbonates. The other options given above are not present in hard water. When hard water is boiled, calcium bicarbonate decomposes into calcium carbonate and carbon dioxide.


Ca(HCO3)2 CaCO3 + H2O + CO2

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