Question 9
Which of the following procedures will give you water free from all impurities?
(a) Adding chlorine tablets
(b) Distillation
(c) Boiling
(d) Filtration

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Solution

The answer is (c).
When water is heated, it boils at a temperature of $100^{\circ} C .$ At this high temperature, all the harmful microorganisms (or germs) present in water are killed and it becomes absolutely safe for drinking.

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Similar questions

Which of the following procedures will give you water that is free from all impurities?

Drinking water cab be made absolutely safe by adding some:

(a) aspirin tablets

(b) iodine tablets

(d) chlorophyll tablets

Which of the following procedures can be used to obtain water which is free from impurities?

(A) Simple distillation	(i) To separate the liquids which are steam volatile, insoluble in water and contains non-volatile impurities.
(B) Fractional distillation	(ii) To separate liquids which decompose at a temperature below their normal boiling points
(C) Vacuum distillation	(iii) To separate two or more liquids which have boiling points close to each other.
(D) Steam distillation	(iv) To separate liquid from non-volatile impurities.

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