Q.

The compound that has the least value for octane number is –

A. 2-methyl heptane
B. Iso-octane
C. 2,2-dimethyl hexane
D. n-heptane
Answer» D. n-heptane
Explanation: Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand. Isooctane (upper) has an octane ratingof 100 whereas n-heptane has an octane rating of O.
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