4. 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: Option D Solution: 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 whereas n-heptane has an octane rating of 0.
