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100Kg of a sample of water contained 6 g...

100Kg of a sample of water contained 6 g of `MgSO_4` . The degree of hardness

A

6 ppm

B

60 ppm

C

5 ppm

D

50 ppm

Text Solution

Verified by Experts

The correct Answer is:
D
`100 kg = 10^5 g rArr " Weight of " MgSO_4 = 6g`
hardness of `MgSO_4 = (6g)/(10^5g) xx 10^6 =60` ppm
hardness in terms of
`CaCO_3 = 60 xx 100/120 = 50` ppm
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