Different water samples A, B, C and D have 150 ppm each of CaCl2,MgSO4,CaSO4

Question

Different water samples A, B, C and D have 150 ppm each of

C a C l_{2}, M g S O_{4}, C a S O_{4} a n d M g C l_{2}

respectively. The order of degree of hardness of these samples is

Options:

A . D > A > B > C

B . A > B > C > D

C . C > B > A > D

D . C > A > D > B

Answer: Option A
:
A

H a r d n e s s \propto \frac{1}{m o l a r m a s s}

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