sblock Elements - Result Question 28
####38. The temporary hardness of water is due to calcium bicarbonate can be removed by adding
(a) $CaCO _3$
(b) $Ca(OH) _2$
(c) $CaCl _2$
(d) $HCl$
$(1979,1 M)$
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Answer:
Correct Answer: 38. (b)
Solution:
- Lime treatment remove bicarbonate hardness by forming insoluble $CaCO _3$ as
$Ca\left(HCO _3\right) _2+Ca(OH) _2 \longrightarrow 2 CaCO _3 \downarrow+2 H _2 O$
