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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 gtA gt D`

D

`C gt A gt D gt B`

Text Solution

Verified by Experts

The correct Answer is:
A
`A = 150 xx 100/111 = 135 .13 p p m`
`B = 150 xx100/120 = 125` ppm
`C =1 50 xx 100/136 = 110.29`ppm
`D = 150 xx 100/95 =157. 89 47` ppm
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