Ozone Layer Depletion

Q.

As air pollution continues to be released into the atmosphere, what becomes more depleted, resulting in an increase of ultraviolet radiation on earth?

1. Rainforests
2. Oceans
3. Carbon monoxide
4. Ozone layer

Q.

What is ODS?

Q. Where is the ozone hole located?

1. Over South America
2. Over Africa
3. Over Australia
4. Over Antarctica

Q.

Briefly explain depletion of ozone layer and its effects.

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

1. Carbon tetrachloride
2. Carbon dioxide
3. Methane
4. Water vapour

Q.

Explain ozone layer, its depletion and effects of ozone depletion.

Q.

_______ used in refrigerators damages the ozone layer of the atmosphere.

Q. The term “Ozone hole” refers to

1. The thickening of ozone in ozone layer
2. The small holes scattered in ozone layer
3. The thinning of the ozone layer
4. Trapping the UV radiations coming from the Sun

Q.

An ozone hole signifies the thickening of the ozone layer.

1. True
2. False

Q. Increased amounts of chlorofluorocarbons in the atmosphere leads to

1. Decrease in atmospheric temperature
2. Invisibility in winter season
3. Dizziness in human beings
4. Depletion of ozone layer

Q.

Question 14
‘Ozone-hole’ means

(a) a large sized hole in the ozone layer
(b) thinning of the ozone layer
(c) small holes scattered in the ozone layer
(d) thickening of ozone in the ozone layer

Q. The chemical formula of ozone is ________.

1. O2
2. NO2
3. O3
4. CO2

Q. Which set of gases are primarily responsible for the depletion of the Ozone layer?

1. Carbon dioxide
2. Chlorofluorocarbons (CFCs)
3. Carbon monoxide
4. Nitrogen oxides

Q.

Question 3
List any three human activities which would lead to an increase in the carbon dioxide content of the air.

Q. Which rays break the ozone molecule into atomic oxygen?

1. Ultraviolent radiations
   
2. Infrared radiations
3. Electromagnetic radiations
4. Radioactive radiations
   

Q.

What would be the effects on widening of ozone hole ?

Q.

Which rays strike on the earth due to the depletion of the ozone layer?

1. Ultraviolet

2. Infrared

3. Visible light

4. Microwaves

Q.

Which of the chemicals are responsible for ozone hole?

1. Greenhouse gases

2. PAN

3. Chlorofluorocarbons

4. Acidic gases

Q. Excessive exposure of humans to UV-rays results in
(i) Damage to immune system
(ii) Damage to lungs
(iii) Skin cancer
(iv) Peptic ulcers

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

Q.

Ozone hole refers to

1. increase concentration of ozone in the atmosphere

2. decrease of thickness of ozone in troposphere

3. decrease in thickness of ozone layer in stratosphere

4. black hole

Q. We know that ozone is formed when uv r adiations fall on earth and it split molecular from of oxygen and the atomic oxygen try to became again molecular by this process ozone is formed so why scientists are not forming ozone by the same process

Q.

What is the reason of increasing concentration of carbon dioxide in the atmosphere?

Q.

In which year the first ozone hole was discovered?

Q. Write the harmful effects of ozone depletion.

Q. Importance of ecosystem lies in _______.

1. flow of energy through trophic levels
2. recycling of nutrients
3. waste decomposition
4. shileding earth from UV rays

Q. What is the cause of ozone depletion?

1. Conversion of oxygen gas in the atmosphere to ozone.
2. Increase of Earth's temperature due to greenhouse effect.
3. Increase in the intensity of the Sun's rays.
4. Conversion of ozone gas in the atmosphere to oxygen.

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

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

Q. State the different types of bio-geochemical cycles and explain the importance of those cycles.

Q.

Question 15
Ozone-layer is getting depleted because of

(a) excessive use of automobiles
(b) excessive formation of industrial units
(c) excessive use of man-made compounds containing both fluorine and chlorine
(d) excessive deforestation.

Q. In which of the following years did Montreal protocol come into effect?

1. 1983
2. 1989
3. 1992
4. 1994