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Question

Hardness of water is measured in terms of ppm (parts per million) of CaCO3. It is the amount (in g) of CaCO3 present in 106gH2O. In a sample of water, 10 L required 0.56 g of CaO to the remove temporary hardness of HCO3.
Ca(HCO3)2+CaO2CaCO3+H2O
Temporary hardness is :

A
200 ppm CaCO3
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B
100 ppm CaCO3
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C
50 ppm CaCO3
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D
25 ppm CaCO3
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