By boiling water, hardness can be removed if it is due to
A. calcium sulphate
B. magnesium sulphate
C. calcium nitrate
D. calcium bicarbonate
Answer: Option D
A. calcium sulphate
B. magnesium sulphate
C. calcium nitrate
D. calcium bicarbonate
Answer: Option D
The fire demand of a city may be worked out by
A. Kuichling’s formula
B. Freeman formula
C. Bustan’s formula
D. All the above
Mathamoglobinemia or blue baby disease is caused due to
A. Chlorides
B. Nitrites
C. Nitrates
D. Sulphides
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