Question

Name:

(a) Three different forms of carbon. 

(b) A form of carbon used as a gem. 

(c) Two substances used to make electric wires. 

(d) Two substances used to make jewellery. 

(e) A substances used as an insulator.

Answer 1

(a) 1. Diamond 

2. Graphite 

3. Coal

(b) Diamond is used as gem. 

(c) 1. Copper. 

2. Aluminium as these are good conductors of electricity. 

(d) 1. Gold. 

2. Silver as these are shining, lustrous, and ductile. 

(e) Plastic is used as insulator as it is bad conductor of electricity.