Question

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

• A. adding chlorine tablets
• B. distillation
• C. boiling
• D. filtration

Answer 1

The correct option is B

distillation

The explanation for the correct option:

B. Distillation

• “Distillation is used for the separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.”
• Water can be free from all impurities via the distillation process. Distillers are commonly used for removing nitrate/bacteria/sodium/hardness (dissolved solids), most organic compounds, heavy metals, and radionuclides from water.
• Distillation effectively removes all the inorganic impurities from the water.
• Distillers are helpful in removing about $99\%$ of the impurities from the water.

The explanation for incorrect options:

Out of boiling, the addition of chlorine tablets and filtration. Distillation methods are the most effective way of making water free from all impurities. Thus options A, C, and D are incorrect.

Hence, the correct option is B i.e. Distillation.