Assertion: Nitrogen dioxide is a brown gas.
Reason: Nitrogen dioxide absorbs light in the blue-green region of the electromagnetic spectrum.
Both assertion and reason are true, and the reason is the correct explanation of the assertion.
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
The assertion is true, but the reason is false.
The assertion is false, but the reason is true.
Correct Option A
The Assertion is true. Nitrogen dioxide is a brown gas at room temperature because it absorbs light in the blue-green region of the electromagnetic spectrum. This absorption causes the complementary color, which is brown, to be observed. The Reason is also true and provides the correct explanation for the Assertion. Nitrogen dioxide
absorbs light in the blue-green region of the electromagnetic spectrum due to the presence of unpaired electrons in its molecular orbitals. This absorption causes the complementary color, which is brown, to be observed. Hence option A is the correct answer.
Option (B) is incorrect because it incorrectly states that the assertion is correct but the reason is incorrect. Both the assertion and reason are correct. Hence option B is incorrect.
Option (C) is incorrect because it incorrectly states that the assertion is incorrect but the reason is correct. The assertion is correct, and the reason is also correct. Hence option C is incorrect.
Option (D) is incorrect because it incorrectly states that both the assertion and reason are incorrect. Both the assertion and reason are correct. Hence option D is incorrect.