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Which of the following compound readily goes under the process of knocking?

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in Engineering Chemistry II by (789k points)
Which of the following compound readily goes under the process of knocking?

(a) 2-ethly butane

(b) n-heptane

(c) benzene

(d) toluene

I got this question in an international level competition.

My question is based upon Octane and Cetane Number in chapter Fuels and Combustion of Engineering Chemistry II

1 Answer

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Best answer
Correct choice is (b) n-heptane

Best explanation: n-heptane is a straight chain hydrocarbon which knocks readily and hence its octane number is zero. Presence of straight chain hydrocarbon in gasoline reduces its rate of combustion.

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