10^5g of a sample of water contained 16....

`10^5`g of a sample of water contained 16.2 g of `Ca(HCO_3)_2` its hardness is

A

200 ppm

B

300 ppm

C

60 ppm

D

100 ppm

Verified by Experts

The correct Answer is:

D

Hardness in terms of
`Ca(HCO_3)_2 =16.2 xx100/162 = 10g`
degree of hardness `= 10/10^5 xx 10^6 = 100` ppm

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