Place these hydrocarbons in order of decreasing boiling point. 1. Paraffin 2. Octadecane 3. Hexane 4. Neohexane and 5. Ethane

In hydrocarbon, the boiling point directly varies with the length of carbon chain. On increasing the number of carbon atom, the boiling point of the compound also increases. Paraffin contains highest number of carbon atoms whereas, ethane is comprised of two carbon atoms.

The decreasing order of boiling point of mention compounds is written as follows:

Paraffin > Octadecane > Hexane > Neohexane > Ethane