Water is said to be temporarily hard when it contains
-
A.
Ca (HCO3)2 and Mg (HCO3)2 salts -
B.
Ca (HCO3)2 and CaCO3 SALTS -
C.
Mg(HCO3)2 and CaSO4 salts -
D.
CaSO4 and Ca(HCO3)2 salts
Correct Answer: Option B
Explanation
Temporary hardness is caused by the presence of dissolved calcium hydrogentrioxocarbonate(IV) which decomposes on heating to form calcium trioxocarbonate(IV).
There is an explanation video available below.