Question

Place these hydrocarbons in order of decreasing boiling point.

1. Paraffin

2. Octadecane

3. Hexane

4. Neohexane and

5. Ethane
A) Paraffin > Octadecane > Neohexane > Hexane > Ethane
B) Paraffin > Octadecane > Hexane > Neohexane > Ethane
C) Hexane > Paraffin > Octadecane > Neohexane > Ethane
D) None of the above

Answer 1

Answer: B) Paraffin > Octadecane > Hexane > Neohexane > Ethane

Explanation:

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

Answer 2

⭐⭐⭐hey mate⭐⭐⭐

__________________________________________________________

⚡⚡✓ON INCREASE IN NUMBER OF CARBON IN CHAIN BOILING POINT ALSO INCREASES.

⚡⚡✓ON INCREASE IN BRANCHING BOILING POINT DECREASES.

as if length increases ,surface area increases and interaction between molecules also increases.

So your answer will be option (b)

Paraffin > octadecane>hexane>neo-hexane>ethane.

Hope it will help you...

#phoenix