Question

13. Which of the following elements is used for the purification of surface water to make it free from germs so that it can be used for drinking purpose?

• A. oxygen
• B. fluorine
• C. chlorine
• D. carbon

Answer 1

The correct option is C

chlorine

Explanation for correct option:

• The process of chlorination uses chlorine to make surface water drinkable.
• The addition of bleaching powder causes chlorine to be released, which aids in the killing of harmful germs, and the resulting pure water is held in storage tanks. The purified water is free of suspended pollutants and toxic microorganisms at the end of the process.
• This water is safe to drink and is referred to as potable water.

Hence option C is correct.