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Presence of which of the forcoming compo...

Presence of which of the forcoming compounds makes water hard ?
`Na_(2)SO_(4),Ca(HCO_(3))_(2),MgCl_(2),Na_(2)CO_(3),CaSO_(4),KCl,NaHCO_(3),MgSO_(4),CaCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
Five `(Ca(HCO_(3))_(2),MgCl_(2),CaSO_(4),MgSO_(4),CaCl_(2))`
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