Home Chemistry Hydrocarbon HARD The octane number of a sample of petrol is 4…
Chemistry Hydrocarbon HARD Single Correct MCQ
Published on: August 14, 2026

The octane number of a sample of petrol is 40. It means that its knocking property is equal to the mixture of

A
40% n -heptane + 60% iso -octane
B
40% petrol + 60% iso -octane
C
60% n -heptane + 40% iso -octane
D
60% petrol + 40% iso -octane

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Verified by Experts
The correct answer is:
C

Octane number of fuel is the percentage of iso - octane in mixture.

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