Question

Name two chemicals used to disinfect water.
NCERT Solutions for Class 7th Science Chapter 18 Wastewater Story Page 228 Exercise Question 7

Answer 1

Answer:

The chemicals which are used as primary disinfectant for purifying water are chlorine, chlorine dioxide and ozone.

Explanation:

Disinfection of water is majorly used process in case of water distribution in an area.

In this process few chemicals are used to kill microorganisms present in water.

The primary disinfectants used are chlorine gas, chlorine dioxide and ozone.

Chlorine is the best disinfectant. Chlorine gas effectively kills microorganisms by dehydration.

Answer 2

Answer:

chorile is the right answer