Assertion :Ozone in the troposphere is a product of ultraviolet radiations acting on dioxygen molecules. Reason: Ozone is thermodynamically very stable.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation(sunlight) and oxygen molecules, which make up 21% of the atmosphere. In the first step, solar ultraviolet radiation breaks apart one oxygen molecule $(O_{2})$ to produce two oxygen atoms (2 O).
Ozone consists of three molecules of oxygen and thus in this its in unstable state so in order to get stable it gives up its one molecule of oxygen to restore diatomic state.
Hence option D is correct answer.

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Similar questions

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: UV radiation causes photo-dissociation of ozone into O₂and O, thus causing damage to the ozone layer.
Reason [R]: The ozone hole has been the major cause of global warming and climate change.

Q. Assertion : UV radiation causes photodissociation of ozone into

O_{2}

and O. Thus causing damage to the stratospheric ozone layer.

Reason : Ozone hole is resulting in global warming and climate change.

Q. Assertion: The compressibility factor for

H_{2}

and

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(1 + \frac{P b}{R T})

Reason: The compressibility factor for

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Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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