Question

• Classify the following into crystalline and amorphous solids.

1. NaCl 

2. Graphite 

3. Plastic 

4. Diamond 

5. Rubber 

6. KCl 

7. Wood 

8. CaCO₃ 

9. Iodine

• Write any two properties of graphite. 

Answer 1

Crystalline solids	Amorphous solids
NaCl, Graphite	Plastic
Diamond, CsCl	Rubber
CaCO3 , Iodine	Wood

• Two properties of graphite

1. It is a good conductor of electricity.

2. Graphite is a good solid lubricant.