The hardness of water sample containing 0.002 mol of magnesium sulphate dissolved in a litre of water is expressed as:

20 ppm

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200 ppm

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2000 ppm

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120 ppm

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240 ppm

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Solution

The correct option is B 200 ppm

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If a sample of water contains 68 ppm of Calcium Sulphate, what would be the hardness of the water?

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