Question

7. The harmful gas that is converted into a friendly gas by the use of catalytic converter is
a. Sulphur dioxide
b. Nitric oxide
c. Carbon monoxide
d. Both (b) and (c)
8. The chemical used in treatment of water to make it free of germs is/are
a. Chlorine
b. Ozone
c. Hydrogen
d. Both (a) and (b)
9. Soil pollution affects the
a. Growth of the plants
b. Burrowing animals
c. Quality of ground water
d. All of these​

Answer 1

Answer:

carbon monoxide is the answer

8 ans chlorine

9 ans all of these

plz make me brain master

Answer 2

Answer:

7c.carbon monoxide

8a.chlorine

9d.all of these