The correct order of octane number of butane, pentane, hexane and cyclohexane is (a) butane > pentane > hexane > cyclohexane (b) butane > pentane > cyclohexane > hexane (c) butane > cyclohexane > pentane > hexane (d) cyclohexane > butane > pentane > hexan

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Q: 11 (CDS-I/2024)
The correct order of octane number of butane, pentane, hexane and cyclohexane is
(a) butane > pentane > hexane > cyclohexane
(b) butane > pentane > cyclohexane > hexane
(c) butane > cyclohexane > pentane > hexane
(d) cyclohexane > butane > pentane > hexane

question_subject: 

Science

question_exam: 

CDS-I

Octane number is a measure of the performance of an engine fuel. Cyclohexane has a higher octane number than straight-chain alkanes like butane, pentane, and hexane due to its cyclic structure, which makes it more stable under compression.