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Which of the following salts is responsible for temporary and permanent hardness of water respectively?

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Which of the following salts is responsible for temporary and permanent hardness of water respectively?
A. `Mg(HCO_(3))_(2)and Na_(2)SO_(4)`
B. `Ca(HCO_(3))_(2) and MgCl_(2)`
C. `MgSO_(4)and Mg(HCO_(3))_(2)`
D. `CaCl_(2) and CaSO_(4)`
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Correct Answer - B
Bicarbonates of calcium and magnesium, chlorides and sulphates of calcium and magnesium are responsible for temporary and permanent hardness respectively.
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