Question

B. State true or false:
1. TNT is an explosive.
2. Formula of carbon monoxide is CO2 .
3. Pesticides and insecticides are chemicals used to kill pests and insects that affect the production of crops.
4. A molecule of hydrogen is made up of three atoms of hydrogen.
5. Talcum powder is made from a mineral called iron.
6. Some metals exist as gases.
7. Molecular formula of the element oxygen is O2.
8. A pure substance consists of a single type of particle.
9. The valency of nitrogen is 3.
10. The atoms of gold are different from the atoms of silver.​

Answer 1

1 T

2 F

3 F

4 F

5 F

6 T

7 T

8 F

9 T

10 T