Question

_________ is/are an ideal disinfectant for waste water.

• A. Boiling
• B. U-V Rays
• C. Ozonisation
• D. Chlorination

Hint:

Remember: Wastewater treatment → Chlorination (most common and economical).

Answer 1

The Correct Option is D

Concept: Disinfection of wastewater involves killing harmful microorganisms before releasing water into the environment.
Step 1: Understanding ideal disinfectant.
An ideal disinfectant should be effective, economical, easy to apply, and capable of destroying pathogens.
Step 2: Evaluate the options.

• Boiling $\rightarrow$ Effective but not practical for large-scale wastewater treatment (incorrect)
• U-V Rays $\rightarrow$ Used but less effective in turbid water (incorrect)
• Ozonisation $\rightarrow$ Effective but expensive (incorrect)
• Chlorination $\rightarrow$ Widely used, economical, and effective (correct)

Step 3: Conclusion.
Thus, chlorination is considered the ideal disinfectant for wastewater treatment.