First slide

Hardness of water

Question

A variety of water which contains soluble salts of Ca and Mg is known as

Easy

A

heavy water
B

soft water
C

hard water
D

conductivity water

Solution

Hard water contains soluble salts
${CaCl}_{2}, {MgCl}_{2}, {CaSO}_{4}, {MgSO}_{4}, Ca {({HCO}_{3})}_{2}, Mg {({HCO}_{3})}_{2}$

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