Ozone Depletion

Q.

Why ozone hole forms over Antarctica? How will enhanced ultraviolet radiation affect us?

Q. Polar stratospheric clouds (PSCs) are formed when temperatures fall so low that water vapour and several other types of molecules in the stratosphere condense into extremely small icy particles. Diatomic molecules have a high tendency to bind to these PSCs and rise up into the atmosphere.

With regard to the assertion and reason, choose the correct option.
Assertion [A]: The ozone layer near the poles is more susceptible to destruction.
Reason [R]: Chlorine molecules bind to PSCs.

1. Both A and R are incorrect
2. Both A and R are correct and R explains A
3. Both A and R are correct but R does not explain A
4. A is correct but R is incorrect
5. A is incorrect but R is correct

Q. Assertion: Global warming is resulting in ozone layer depletion.

Reason: UV rays cause photodissociation of ozone to oxygen.

1. Both assertion and reason are true and the reason is the correct explanation of assertion
2. Both assertion and reason are true but the reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

Q.

The Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

1. 1985

2. 1986

3. 1987

4. 1988

Q.

Depletion of ozone layer causes

1. Breast cancer

2. Blood cancer

3. Lung cancer

4. Skin cancer

Q.

What are the effects of thinning of the ozone layer?

Q. CFCs are responsible for

1. ozone formation
2. global warming
3. ozone depletion
4. acid rain

Q.

Ozone prepared in Siemens ozoniser is known as_____.

Q.

The Ozone hole is maximum over

1. Europe

2. Antarctica

3. India

4. Africa

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: UV radiation causes photo-dissociation of ozone into O₂ and O, thus causing damage to the ozone layer.
Reason [R]: The ozone hole has been the major cause of global warming and climate change.

1. Both A and R are true and R is the correct explanation for A
2. Both A and R are true but R is not the correct explanation for A
3. A is true but R is false
4. Both A and R are false

Q.

High flying jets and rockets release _______________.

Q. World Environment Day coincides with commemoration of

1. Montreal Protocol
2. Vienna Convention
3. First United Nations Conference on Human Environment
4. Helsinki Declaration

Q.

Choose the incorrect statement.

1. Dobson units are not used to measure ozone content.

2. Methane and Carbon dioxide are green house gases.

3. Use of incinerators is crucial to disposal of hospital wastes.

4. The Montreal protocol is associated with the control of emission of ozone depleting substances.

Q. Increased use of CFCs in the world is likely to have resulted in which of the following statements.

1. Person in Antarctica is more likely to develop skin cancer.
2. Person in Africa is more likely to develop skin cancer.
3. Person in Africa is less likely to develop skin cancer.
4. Person in Antarctica is less likely to develop skin cancer.

Q.

Ozone hole is largest over

1. New york

2. Arctic

3. ​​​​​​Antarctica

4. Tokyo

Q. State whether true or false:
By 2011, scientists have been able to identify three separate holes in the Ozone layer. One in Tibet, one in the North Pole and one in Antarctica. The size of these ozone holes were calculated using the Dobson Meter and measured in Dobson units.

1. True
2. False

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: UV radiation causes photo-dissociation of ozone into O₂ and O, thus causing damage to the ozone layer.
Reason [R]: The ozone hole has been the major cause of global warming and climate change.

1. Assertion is true but reason is false
2. Both assertion and reason are false
3. Both assertion and reason are true and the reason is the correct explanation for assertion
4. Both assertion and reason are true but the reason is not the correct explanation for the assertion

Q. State whether true or false:
A single chloride ion while rising through the ozone layer, can destroy tens of thousands of ozone molecules before exiting out of the stratosphere.

1. True
2. False

Q.

The Ozone hole is maximum over

1. Europe

2. Antarctica

3. India

4. Africa

Q. Aion while rising through the ozone layer, can destroy tens of thousands of ozone molecules before exiting out of the stratosphere.

1. chloride
2. fluoride
3. hydrogen
4. carbon

Q. Assertion: Global warming is resulting in ozone layer depletion.

Reason: UV rays cause photodissociation of ozone to oxygen.

1. Both assertion and reason are true and the reason is the correct explanation of assertion
2. Both assertion and reason are true but the reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

Q. Aion while rising through the ozone layer, can destroy tens of thousands of ozone molecules before exiting out of the stratosphere.

1. chloride
2. fluoride
3. hydrogen
4. carbon

Q. The Earth Summit held in Rio de Janeiro in $1992$ was called?

1. To reduce $C{O}_2$ emissions and global warming
2. For conservation of biodiversity and sustainable utilization of its benefits
3. To assess treat posed to native species by invasive weed species
4. For immediate steps to discontinue use of CFCs that were damaging the ozone layer

Q. UV radiations contribute to the production of

1. methane
2. carbon dioxide
3. ozone
4. oxygen

Q. Major source of air pollution is​

1. 
   burning of fossil fuels​
2. 
   burning of wood​
3. 
   burning of biogas​
4. 
   burning of dung cakes​

Q.

CFCs have a harmful impact on _________ layer.