JEE Main Chemistry question

A (research) octane number of 112 is reported for which of the following highly branched heptane isomers?

(A)2,2,4-Trimethylpentane
(B)2,3,4-Trimethylpentane
(C)2,2,3-Trimethylbutane (triptane)Correct
(D)2,2-Dimethylbutane

Answer: (C)

Solution

2,2,3-Trimethylbutane ("triptane," CH) is an exceptionally compact, highly branched heptane isomer. Its high degree of branching strongly resists pre-ignition knocking, giving it one of the highest octane ratings

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Question ID VK-142842