Which of the following has highest octane number?

Options

A. n-hexane
B. n-heptane
C. n-pentane
D. 2, 2, 4-trimethyl pentane

Answer

D

Explanation

It is a standard measure of the performance of an engine or aviation fuel. The higher the octane number, the more compression the fuel can withstand before igniting.
Iso – octane or 2, 2, 4 – trimethylheptane has an octane rating 100.
Whereas, n–heptane has an octane rating zero.