Sterilisation

Q.

_____________ (Nitrogen/Chlorine) gas is used to kill germs and bacteria.

Q. Fill in the blanks with the help of the hints given below.
1. ___________ is a physical method used for removing impurities from water using filters. (chlorination/filtration)​
2.The process in which bleaching powder is used for purifying water is ___________ . (chlorination/filtration)

Q.

For sterilizing water, ozone is also used. This process is called

1. cleaning

2. washing

3. sterilization

4. disinfection

Q.

Water when treated with ______ prevents the growth of germs.

1. chlorine
2. oxygen
3. nitrogen
4. carbon dioxide