Water containing ______ at concentrations below 60 milligrams per litr – McqOptions

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1.	Water containing ______ at concentrations below 60 milligrams per litre is generally considered as soft.
A.	Sodium carbonate
B.	Potassium carbonate
C.	Calcium carbonate
D.	Potassium bicarbonate
Answer» D. Potassium bicarbonate

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