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Different water samples A, B, C and D ha...

Different water samples A, B, C and D have 150 ppm each of `CaCl_2, MgSO_4, CaSO_4`, and `MgCl_2` respectively. The order of degree of hardness of these samples is

A

`D gt A gt B gt C`

B

`A gt B gt C gt D`

C

`C gt B gt A gt D`

D

`C gt A gt D B`

Text Solution

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The correct Answer is:
A
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