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Assertion : On cooling, the brown colour...

Assertion : On cooling, the brown colour of nitrogen dioxide disappears.
Reason : On cooling, `NO_2` undergoes dimerisation resulting in the pairing of odd electron of `NO_2`

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

B

If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

C

If Assertion is correct , but Reason is incorrect

D

If both Assertion and Reason are incorrect

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The correct Answer is:
A
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