Given below are two statements, one labelled as Assertion (A) and the other as Reason (R). In the light of the above statements, choose the correct answer from the options given below.
Assertion (A):Volatile organic compounds (VOCs) are often measured in the atmosphere as non-methane hydrocarbons.
Reason (R):Methane is highly reactive in photochemical smog formation.
ABoth A and R are correct and R is the correct explanation of A
BBoth A and R are correct but R is not the correct explanation of A
CA is correct but R is not correct ✓ Correct
DA is not correct but R is correct
Correct answer: (C) A is correct but R is not correct
Explanation
The assertion is correct, as VOCs in air are commonly reported as non methane hydrocarbons.
The reason is not correct, because methane is relatively unreactive in photochemical smog formation.
Methane's low reactivity is exactly why it is excluded from the reactive VOC count.
The remaining non methane hydrocarbons drive most ground level ozone and smog.
Sunlight acts on these reactive VOCs together with nitrogen oxides to form smog.
Excluding methane gives a truer measure of the pollutants that create urban smog.
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