Question

More than one correct answers are possible.

Which of the following methods are used for the purification of water?

• A. Boiling
• B. Evaporation
• C. Condensation
• D. Chlorination

Answer 1

Answer: (A), (B), (D)

Chlorination

The explanation for the correct options:

(A) Boiling: At the household level, boiling is the simplest way to purify water.

• Boiling of water takes place at 212 Farahnite and most of the microorganisms can not survive above 160 Farahnite.
• Thus, it helps in killing harmful bacteria.

(B) Evaporation: Distillation is the process that uses evaporation for the purification of water.

• This process is used in obtaining distilled water that is used in laboratories.

(D) Chlorination: It is the process of adding chlorine to the water.

• Addition of chlorine to water results in purification of water by killing bacteria

The explanation for the incorrect options:

(C) Condensation: It is the process of conversion of water vapors into liquids. It is not a type of water purification method.

Therefore the correct options are options (A), (B), and (D).