Ozone Depletion

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

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. UV radiations contribute to the production of

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