Iron reacts with moist air to form iron oxide, and magnesium burns in oxygen Class 8

Iron reacts with moist air to form iron oxide, and magnesium burns in oxygen Class 8

Iron reacts with moist air to form iron oxide, and magnesium burns in oxygen to form magnesium oxide. Classify all the substances involved in the above reactions as elements, compounds, or mixtures, with justification. Class 8

Answer:

(i) Iron reacts with moist air to form iron oxide

Iron + Oxygen + Water → Iron Oxide

(ii) Magnesium burns in oxygen to form magnesium oxide

Magnesium + Oxygen → Magnesium Oxide

Iron (Fe): Element (cannot be broken down into simpler substances).

1. Moist air: Mixture (a combination of gases including nitrogen, oxygen, and water vapour).
2. Iron oxide: Compound (formed from the chemical reaction of iron and oxygen).
3. Water: Compound (Chemically combined hydrogen and oxygen in a fixed ratio).
4. Magnesium: Element (cannot be broken down into simpler substances).
5. Oxygen: Element (diatomic molecule, cannot be broken down further).
6. Magnesium oxide: Compound (formed from the chemical reaction of magnesium and oxygen).