The hardness of water caused by 0.25 moles of MgCl2 is equal to i) The hardness of water caused by 25 grams of CaCO3ii) The hardness of water caused by 0.25 moles of CaCO3iii) The hardness of water caused by 1 moles of CaCO3

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$The hardness of water caused by 0.25 moles of {MgCl}_{2} is equal to$

i) The hardness of water caused by 25 grams of ${CaCO}_{3}$

ii) The hardness of water caused by 0.25 moles of ${CaCO}_{3}$

iii) The hardness of water caused by 1 moles of ${CaCO}_{3}$

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only ii is correct

only i is correct

i and ii are correct

i and iii are correct

answer is B.

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Detailed Solution

Same moles of substances causes same degree of hardness.

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