JEE Main 2015 · 4 Apr · Shift 1 · Chemistry Q50

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ChemistrySingle correct+4 / -1Question 50 of 90

Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.

Reason : The reaction between nitrogen and oxygen requires high temperature.

Both assertion and reason are correct, and the reason is the correct explanation for the assertion

Both assertion and reason are correct, but the reason is not the correct explanation for the assertion

The assertion is incorrect, but the reason is correct

Both the assertion and reason are incorrect

Answer and worked solution

Official answer: A

Both are true: $\ce{N2 + O2 -> 2NO}$ is strongly endothermic and needs very high temperatures (lightning, engines). That high-temperature requirement is the reason they do not react in ordinary air.

Topics:Group 15

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JEE Main 2015 · 4 Apr · Shift 1, Chemistry question 50