Question

how will you prove that carbon dioxide contains carbon​

Answer 1

Answer:

If you have a container filled with carbon dioxide, one easy way to prove it is indeed carbon dioxide would be to place some ignited magnesium inside. The flame looks very similar to what you can see when magnesium burns in air, but if you look at the products, it’s not just the white powder of magnesium oxide, it’s mixed with a black brittle solid - carbon (specifically graphite as it’s the most stable allotropic form at standard conditions).