1. What is a product of petroleum used in dry cleaning? 2. What is a complex mixture of solid, liquid and gaseous hydrocarbons?

3. a) Define refining of petroleum.
b) What are the various products obtained from refining of petroleum? Write one use for each.

4. List the different types of coal with their carbon content and give one use for each.

5. What do you understand by global warming? Give any two consequences of global warming.​