1. Discuss the three main intermolecular forces described in chapter 11 using relevant examples.

2. List the following substances: Ar, Cl2, CH4 and CH3COOH in order of their increasing strength of intermolecular attractions. Give reason for your answer.

3. Which intermolecular force is present in Water?

4. Some of the remarkable consequences  of the intermolecular force present in water can be used to explain the  “Expansion of water upon freezing”, which explains why icebergs float in water and why water pipes burst in freezing temperatures. 

Question: Using the concept of the intermolecular force present in water: Discuss why water expands upon freezing.