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Social & Preventive Medicine General 668a992b

Hardness of water is contributed by following salts except-

A
Calcium gluconate
B
Magnesium chloride
C
Calcium sulfate
D
Magnisum bicarbonate
High-Yield Explanation
Ans. is 'a' i.e., Calcium gluconate o I lardness may be : - i) Temporary (Carbonate) hardness Calcium bicarbonate & Magnesium bicarbonate. It is called temporary because it can be removed by boiling or addition of lime. ii)Permanent (Non-Carbonate) hardness --> Calcium Sulfate, magnesium sulfate, Calcium chloride, magnesium chloride. It is called permanent because it cannot be removed by boiling.

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