The hardness of water is caused by: - Vidyadip

MCQ

The hardness of water is caused by:

A
All of these
B
$Mg \left( HCO _3\right)_2$
C
$CaCl _2$
D
$CaSO _4$

✓

Answer

(a) All of these
Explanation: The hardness of water is caused by magnesium and calcium salts. Calcium and magnesium dissolved
in water are the two most common minerals that make water hard. Temporary hardness is a type of water hardness caused by
the presence of dissolved bicarbonate minerals (calcium bicarbonate and magnesium bicarbonate).

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