Ozone Layer

Q.

what are the sources of oxygen?

Q.

What are bad ozone and good ozone?

Q.

How does the atmosphere protect us from ultraviolet rays?

Q.

Which of the following is the primary reason for the depletion of ozone layer?

1. Excessive deforestation

2. Automobile exhaust

3. Carbon dioxide

4. CFCs

Q.

Why is ozone layer called ozone umbrella/shield ?

Q.

How does Ozone protect the Earth?

Q. All of the following are harmful effects of high energy UV radiations, except

1. Weaken the immune system
2. Harm eyesight causing cataract
3. Increased yield of crop plants
4. Increased embryonic mortality

Q.

What is the formula for ozone?

1. O2

2. O3

3. CO2

4. O4

Q.

How CFCs are harmful to the environment and living beings? [2 MARKS]

Q.

HOw ozone layer is useful to us?

Q. The ozone layer is present in

1. Stratosphere
2. Mesosphere
3. Exosphere
4. Thermosphere

Q. Ozone layer protects the life on Earth from the harmful effects of UV radiations by absorbing them.

1. True
2. False

Q. In the upper atmosphere, ____ gets converted to ozone.

1. nitrogen
2. oxygen and methane
3. oxygen
4. carbon monoxide

Q.

The combination of tropospheric ozone, smoke and fog produces

___ .

Q.

What is ozone layer (=umbrella)?

Q. Blocking the UV rays is one of the many functions of the Ozone layer.

1. True
2. False

Q. Question 16
Which of the following is a recently originated problem of environment?

(a) Ozone layer depletion
(b) Green house effect
(c) Global warming
(d) All of the above

Q. What are the two forms of oxygen found in the atmosphere?

1. Molecular oxygen $\left(O_2\right)$
2. Ozone $O_3$
3. Oxygen radical (O)
4. Tetra atomic oxygen $O_4$

Q.

The combination of tropospheric ozone, smoke and fog produces ___ .

Q. What is produced with the combination of tropospheric ozone , smoke and fog

Q. What would happen, if all the oxygen present in the environment is converted to ozone?

1. It will become poisonous and kill living forms
2. Ozone is not stable, hence it will be toxic
3. We will be protected more
4. It will help harmful sun radiations to reach earth and damage many life forms

Q.

The two forms of oxygen found in the atmosphere are:

1. Water and ozone

2. Water and oxygen

3. Ozone and oxygen

4. water and carbon dioxide

Q. The ozone layer is present in

1. Stratosphere
2. Exosphere
3. Mesosphere
4. Thermosphere

Q.

Question 6
Depletion of ozone is mainly due to

(a) chlorofluorocarbon compounds
(b) carbon monoxide
(c) methane
(d) pesticides

Q.

The combination of tropospheric ozone, smoke and fog produces ___.

Q.

During the winter season, a person sleeps in a closed room with burning firewood. He experiences nausea and giddiness. The emission of which of the following gas is responsible for it?

1. Carbon dioxide

2. Carbon monoxide
3. Nitrous oxide
4. Sulphur dioxide

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

Q. Since decades, Antarctica has been a place of intense scientific research. Various countries have established their bases in Antarctica to study the impact of climate change. The ozone hole was discovered in 1985 in Antarctica. Which of the following is true regarding ozone hole?

1. Ozone hole is aggravated due to modernisation and use of technology without environment sustainability.

2. Ozone hole is a portion of the atmosphere where the concentration of ozone is the most.

3. If ozone hole appears in tropical and temperate regions, it could cause a series of health problems.
4. Ozone hole occurence is a seasonal phenomenon.

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

Q.

Question 16
Which of the following is a recently originated problem of environment?

(a) Ozone layer depletion
(b) Greenhouse effect
(c) Global warming
(d) All of the above