Question

Assertion (A) Nitrogen and oxygen are the main components in the atmosphere but these do not react to from oxides of nitrogen.

Reason (R) The reaction between nitrogen and oxygen requires high temperature. 

(a) Both Assertion and Reason are correct and the reason is the correct explanation for the Assertion.

(b) Both Assertion and Reason are correct but the reason is not the correct explanation for the Assertion.

(c) The Assertion is incorrect but the Reason is correct.

(d) Both the Assertion and Reason are incorrect.

Answer 1

Correct Option (a) Both Assertion and Reason are correct and the reason is the correct explanation for the Assertion.

Explanation:

Nitrogen is an inert gas because of the presence of strong bond. That's why although there is 78% N₂ in the atmosphere but nitrogen oxide in not formed under ordinary conditions.

But when temprature is high enough i.e. = 2000K, it reacts with oxygen to form nitrogen oxide.

N₂ + O₂ →(2000K) 2NO

Thus Assertion and Reason are true and Reason is the correct explanation of the Assertion.