First slide

Hardness of water

Question

Hardness of water is due to the presence of

Easy

A

CaCl₂
B

MgSO₄
C

Ca(HCO₃)₂
D

All the above

Solution

Hardness of water is due to the following salt.
Ca & Mg bi carbonates, ⇒ Ca(HCO₃)₂, Mg(HCO₃)₂
Ca & Mg chlorides, Sulphates ⇒ CaCl₂, MgCl₂
CaSO₄, MgSO₄

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