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Temporary hardness of water is due to the presence of of _ _ _ _ _ calcium and magnesium in water.

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Temporary hardness of water is due to the presence of of _ _ _ _ _ calcium and magnesium in water.
A. `CaCl_(2)`
B. `MgSO_(2)`
C. `Ca(HCO_(3))_(2)`
D. All of these
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Correct Answer - D
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