Question

Which of these a water purifier cannot do?

• A. remove odour from water
• B. remove hardness from water
• C. remove unwanted impurities from water
• D. none of these

Answer 1

The correct option is D

none of these

The correct option is D.

The explanation of the correct option:

1. Water purifiers produce water that is fit for specific purposes.
2. They remove undesirable chemicals, contaminants, suspended solids, and gases from water.

The explanation of the incorrect options:

Option A:

Water purifiers force water against a semi-permeable membrane that helps in removing bacteria, different types of microorganisms, and odor in the water.

Option B:

1. Water purifiers work specifically to filter water for hard water through several stages to remove dissolved solids and other impurities.
2. The water purifier is a convenient method to treat hard water at home.

Option C:

A water purifier uses a process involving ultrafiltration, carbon block, and modern water filtration technology to eliminate chemicals and unwanted impurities.

Final Answer: None of these is a valid option as a water purifier can remove odor, unwanted impurities, and hardness from water.