Assertion :Straight chain alkanes have very low octane number. Reason: Quality of gasoline is measured in terms of octane number.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Straight chain alkanes have very low octane number because as the length of the chain increases, octane number further decreases. The octane number (ON) is a measure of the knock resistance of gasoline. It defines a numerical value from 0 to 100, and describes the behavior of the fuel in the engine during combustion.

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