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Standard VIII

Chemistry

Fractional Distillation of Petroleum

Assertion :As...

Question

Assertion :As a gasoline (petrol) additive, benzene increases the octane rating and reduces knocking. Reason: Octane number of aromatic compound is the highest.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The octane number is a very important property for many intermediate streams that blend to produce automobile gasoline, diesel etc. Using typically gasoline tends to knock the engines. So, benzene is used as an additive as it is an aromatic compound and aromatic have higher octane number. It increases octane rating and reduces knocking.

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