Question

1. Boiling point depends on the inter  molecular hydrogen bonding. 

• Ethanol and propane have comparable molecular masses but their boiling points differ widely. Why?

2. Williamson synthesis is an important method of ether synthesis. Which of the following reactions is better for ether synthesis? Justify.

Answer 1

1. Ethanol molecules are associated by inter molecular hydrogen bonding. 

• Ethanol molecules are associated by inter molecular hydrogen bonding. This is absent in propane. So Ethanol has higher boiling point. 

2. (CH₃)₃ C-ONa + CH₃ -Br is better. The tertiary alkyl halide undergoes elimination in presence of base to form alkene.