Which of the following compounds is known to produce severe engine knocking?

Organic Chemistry MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Organic Chemistrychemistry-mcqs › organic-chemistry
Published
17 Mar 2019
Last updated
28 May 2026

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Explanation

Among these hydrocarbons, normal heptane is recognized for causing pronounced knocking in engines due to its low octane rating, whereas iso-octane and other branched isomers resist knocking better.

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