Question

You have seen many substances burning. Recall the activity of the burning of a magnesium ribbon. It changes to white ash after burning. You are also familiar with the burning of a candle. The wax of the candle vapourises in the air. COMBUSTION The process of burning of a substance in the presence of oxygen to give off heat is called combustion. It is accompanied by light either as a flame or as a glow, and sometimes, sound also. Combustion is a chemical change. In this type of chemical change, oxygen reacts with the substance getting burnt. The addition of oxygen is also called oxidation. Thus, we can say that combustion is chemically oxidation. We cannot get back the original substance after combustion.​

Answer 1

Answer:

so what do we have to do question is incomplete

Answer 2

Answer:

What does magnesium ribbon do?

Explanation:

The burning magnesium ribbon produces light of sufficient intensity to cause temporary loss of sight. Avoid looking directly at the light source. The burning of magnesium in air produces intense heat which can cause burns and initiate combustion in flammable materials.