Air, combustion, rusting and fire fighting questions | form one Chemistry

Which of the following gives the correct meaning of air?

1. Mixture of Nitrogen, Oxygen and dust particles
2. Mixture of Nitrogen, Oxygen and Carbondioxide
3. Mixture of Nitrogen, Oxygen and Water vapour.
4. Homogenous mixture of gases.

Answer / Solution

UNSOLVED

The substances that can be used to extinguish fire are:
A. carbon dioxide and sand
B. carbon dioxide and sugar
C. nitrogen and sand
D. nitrogen and water.

Answer / Solution

UNSOLVED

Mention three things which are necessary in starting a fire.

Answer / Solution

UNSOLVED

Answer / Solution

UNSOLVED

The mixture of substances can extinguish fire

1. Oxygen and Nitrogen
2. Carbon dioxide and Sand
3. Carbon dioxide and Hydrogen
4. Hydrogen and Neon

Answer / Solution

UNSOLVED