Ozone Layer Depletion

Q.

Which disease is caused by exposure to ultra violet radiation?

1. Diarrhea

2. Skin cancer

3. Malaria

4. Influenza

Q. Which of following is produced when electrical discharges pass through oxygen in air?

1. CFCs
2. Methane
3. Ozone
4. Lead

Q. Which among the following is responsible for the depletion of ozone layer?

1. Chlorofluorocarbon
2. Nitrogen gas
3. Carbon dioxide gas
4. Sulphur dioxide gas

Q.

Write the chemical formula for Ozone gas? What was the major depleter of ozone in the past? What does ozone protect from? [3 MARKS]

Q.

A single atom of chlorine can destroy about = __________

Q.

Ozone blanket is present in which of the following main layers of the atmosphere?

1. Mesosphere

2. Troposphere

3. Stratosphere

4. Thermosphere

Q.

Ozone-layer is getting depleted because of:

1. Excessive use of automobiles

2. Excessive formation of industrial units

3. Excessive use of man-made compounds containing both fluorine and chlorine

4. Excessive deforestation.

Q. Which of the following green house gases are responsible for global warming?

1. Methane
2. Nitrous oxide
3. Carbon dioxide
4. All the above

Q.

Question 25
What do CFCs stand for? Name some devices where CFCs are used. Why CFCs are considered as pollutants?

Q.

Question 22
Match the items of Column A with those of Column B.
$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(a)Sulphur dioxide}& \text{(i)Damage ozone layer}\\ \text{(b)Carbon dioxide}& \text{(ii) Reduces oxygen carrying-capacity of blood}\\ \text{(c)Carbon monoxide}& \text{(iii)Acid rain}\\ \text{(d)Chlorfluorocarbons}& \text{(iv)Greenhouse gas}\end{array}$

Q. What are the various consequences of deforestation.

Q. Write the chemical formula for Ozone gas? What was the major depleter of ozone in the past? What does ozone protect from? [3 MARKS]