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Hardness in water is expressed in terms of ____________ equivalents.(a) Calcium carbonate(b) Calcium bicarbonate(c) Magnesium hydroxide(d) Magnesium oxideI have been asked this question in a national level competition.My question is from Problems, Units and Formulae topic in section Water of Applied Chemistry

Answer» RIGHT answer is (a) CALCIUM CARBONATE

The explanation: Hardness of the water is expressed in terms of the calcium carbonate equivalents. They are like ppm, DEGREE Clark and French unit.


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