Question

Sita visited a wastewater treatment plant to understand its functioning. She observed that after the biological treatment is done, a chemical was added to the wastewater. On enquiry, the official explained that it was to kill harmful microorganisms. Which of these chemicals is used to disinfect water? (i) Silica (ii) Ozone (iii) Washing soda (iv) Charcoal​

Answer 1

Answer:

charcoal is the correct answer hope it helps , annyeong

Answer 2

Answer:

The right ans is ozone not charcoal