Assertion : `NO_(2)` is readily dimerised to `N_(2)O_(4)` Reason :`NO_(2)` has one unpaired electron and two such electron with opposite spin in two `NO_(2)` molecules form bond between two N-atoms readily.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true.

Assertion : `NO_(2)` is readily dimerised to `N_(2)O_(4)` Reason :`NO_

1.	Assertion : `NO_(2)` is readily dimerised to `N_(2)O_(4)` Reason :`NO_(2)` has one unpaired electron and two such electron with opposite spin in two `NO_(2)` molecules form bond between two N-atoms readily.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true.
Answer» Correct Answer - a Since the process does not require any rearrangement and thus energy of activation for dimension of `NO_(2)` is low.

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