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Objective Question & Answer

QUESTION

Objective Question

Q.1

If total hardness and alkalinity of a water sample are 200 mg/l as CaCO3 and 260 mg/l as CaCO3 respectively, what are the values of 

carbonate hardness and non-carbonate hardness?

 

A
200 mg/l and zero
B
Zero and 60 mg/l
C
Zero and 200 mg/l
D
60 mg/l and zero
Answer ( Option A)

200 mg/l and zero

Solution

CH = min(TH, alkalinity}

= min {200, 260} = 200mg / l

NCH TH - alkalinity

= 200 - 260  - 60 (negative)

= NCH = 0

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