Temporary hardness may be removed from water by adding

Temporary hardness may be removed from water by adding

A
${CaCO}_{3}$
B
$Ca (OH)_{2}$
C
${CaSO}_{4}$
D
$HCl$

Solution:

$Ca {({HCO}_{3})}_{2} + Ca (OH)_{2} \to 2 {CaCO}_{3} ↓ + 4 H_{2} O$

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