Ozone layer

Q. How many atoms of oxygen is found in a molecule of ozone?

1. Two
2. Three
3. Four
4. Five

Q. Identify the correct statements and choose the correct option.
(i) Ozone is poisonous.
(ii) Ozone absorbs harmful radiations from the sun.
(iii) CFCs are responsible for ozone layer depletion.
(iv) Ozone is a diatomic molecule.

1. (ii), (iii), (iv)
2. (i), (ii), (iii), (iv)
3. (i), (ii), (iii)
4. (i), (ii), (iv)

Q.

‘Ozone-hole’ means:

1. A large sized hole in the ozone layer

2. Thinning of the ozone layer

3. Small holes scattered in the ozone layer

4. Thickening of ozone in the ozone layer