Question

Insoluble impurities in a sample of water can be removed by

• A. Boiling
• B. Filtration
• C. Distillation
• D. Adding chlorine

Answer 1

The correct option is B

Filtration

Explanation for correct option:

Option B

• Water from natural resources contains many impurities.
• Substances that make water unfit for beneficial use, are called impurities.
• There are two types of impurities: soluble and insoluble impurities.
• The impurities which get mixed along with the water, are called soluble impurities.
• The impurities which get settled at the bottom of the water, are called insoluble impurities.
• It includes mud, sand, plastics, clay, etc.
• The impurities which remain insoluble in water can be removed by a process such as Sedimentation, Decantation, and filtration.

Therefore, Option B is correct.
Explanation for incorrect option:

Option A

• Boiling is the simplest method of removing the impurities from water.
• Through boiling, harmful bacteria or other pathogens can be killed and make water safe for drinking.

Therefore, Option A is incorrect.

Option C

• Distillation is a separation technique.
• It is selective boiling.
• It is the process of separating components of a mixture based on different boiling points.

Therefore, Option C is incorrect.

Option D

• Adding chlorine into the water to purify this is called chlorination.
• The filtered and aerated water is chlorinated by adding chlorine to it.
• Chlorine kills all harmful germs.

Therefore, Option D is incorrect.