Question

2 a) Which gas helps things to burn? b) Which gases extinguish things which are burning? ​

Answer 1

a.  Oxygen helps things to burn .

b. Carbon Dioxide extinguish things which are burning

Answer 2

Answer:

Oxygen is the gas which helps things to burn.

Know about that:

Oxygen. Air contains about 21 percent oxygen, and most fires require at least 16 percent oxygen content to burn. Oxygen supports the chemical processes that occur during fire. When fuel burns, it reacts with oxygen from the surrounding air, releasing heat and generating combustion products (gases, smoke, embers, etc.).

Carbon dioxide is the gas which extinguish things which are burning.

Know about that:

Carbon dioxide gas is non inflammable. Carbon dioxide gas does not support combustion. It displaces oxygen so that oxygen cannot come in contact with fire. Thus, carbon dioxide gas stops the supply of oxygen thereby removing oxygen from the fire triangle.