Question

Hardness of water does not
A.have any bad effect in boiler
B. make cooking of foods difficult
C. make it unfit for drinking
D. cause difficulty in the washing of clothes with soaps

Answer 1

D. cause difficulty.........soaps

Answer 2

The hardness of water does not affect the drinkability of water.

• The hardness of water is caused by the presence of different types of minerals like calcium and magnesium in high concentrations in it.
• This causes the formation of white flakes in a boiler when the hard water is boiled.
• It also makes cooing food difficult due to the higher cooking time caused by the presence of impurities like minerals.
• It also makes it harder to wash clothes with soap since the minerals present in hard water combine with soap to form insoluble salts also called soap scum.
• However, hard water is fit for drinking since these salts are not toxic

Thus, the hardness of water does not (Option c) make it unfit for drinking.