Question

Give reasons for the following: 

1. Methane does not undergo addition reactions, but ethene does. 

2. Ethyne is more reactive than ethane. 

3. Hydrocarbons are excellent fuels.

Answer 1

1. Methane does not undergo addition reaction, because it is bonded with four Hatom while in ethene double bond breaks and provide site for addition. 

2. Due to the presence of triple bond it provide site for addition, hence ethyne is more reactive than ethane. 

3. Hydrocarbon are excellent fuels as they produces lot of heat during combustion.