A magnesium ribbon continues to burn brilliantly in a gas jar containing carbon dioxide.

Ans.

1. Magnesium is a strong reducing agent.
2. When a burning magnesium ribbon is introduced in a gas jar containing carbon dioxide, magnesium reduced carbon dioxide to carbon.
3. This reaction is exothermic.
4. Hence, a magnesium ribbon continues to burn brilliantly in the gas jar containing carbon dioxide.