Calculate the octane number of gasoline fuel, which contains `25%` n - heptane and `75%` is iso - octane.

A fuel contains 25% n-heptane and 75% iso-octane. Its octane number is :

Define octane number. A sample of gasoline produces the same knocking as mixture containing 35% n-heptane and 65% iso-octane. What is the octane number of the sample ?

A sample of petrol contains 30% n-heptane. Its octane number is

A fuel having high octane number contains mainly :