Question

Useful substance in making water bacteria free is:

• A. Washing soda
• B. Baking soda
• C. Alum
• D. Bleaching powder

Hint:

Bleaching powder is widely used for water purification because of its ability to release chlorine, which disinfects water and kills bacteria.

Answer 1

The Correct Option is D

To make water bacteria-free and disinfect it, certain chemicals are used. Among the given options:
Step 1: Washing Soda
Washing soda (sodium carbonate) is commonly used for cleaning and washing purposes, but it does not have the properties required to purify water from bacteria.
Step 2: Baking Soda
Baking soda (sodium bicarbonate) is primarily used in cooking, cleaning, and deodorizing, but it does not disinfect water or remove bacteria.
Step 3: Alum
Alum (potassium aluminum sulfate) is used in water purification to help in the coagulation process, where it helps remove suspended particles. However, it is not directly used for killing bacteria.
Step 4: Bleaching Powder
Bleaching powder (calcium hypochlorite) is a powerful disinfectant commonly used to purify water and make it bacteria-free. It works by releasing chlorine, which kills harmful bacteria and other microorganisms in water.
Step 5: Conclusion.
Thus, the most effective substance for making water bacteria-free among the options is Bleaching powder. The correct answer is (D).