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

Options

A. 2 - methyl heptane
B. Iso - octane
C. 2, 2 - dimethyl hexane
D. n - heptane

Answer

D

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 rating of 100 where- as n-heptane has an octane rating of 0.