Out of 2, 2, 3-trimethylbutane, 2,2 4-trimethylpentane and 2, 2, 3, 3,-tetramethyl butane which has the highest octane number? Explain.

Arrange the following in order of increasing volatility: gasoline, kerosene and diesel.

Name the scale for measuring the quality of diesel fuel. 

Which of the following alkane has higher octane number:
(i) n-hexane    (ii) neohexane?

What is the cause of lead pollution of air?

What is the purpose of cracking?

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

Name one compound that has negative octane number.

Which compound of lead is added to gasoline (petrol) to increase its octane number?

What is gasoline? What is its use?