MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryHydrogenPrevious Year Questions
The degree of hardness of water is usually expressed in terms of (AMU 2010)
A.ppm by weight of MgSO4.
B.g/L of CaCO3 and MgCO3 present
C.ppm by weight of CaCO3 irrespective of whether it✓ Correct
D.ppm of CaCO3 actually present in water.
Explanation
Hardness of water is due to the presence of salts of calcium and magnesium. The hardness of water can be classified as temporary and permanent hardness based on the composition of salts present in the water. And HYDROGEN 24 the hardness of water is measured in parts per million (ppm) by weight of calcium carbonate 3 CaCO because it is insoluble in water, and it is easy to measure.
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