Explain the following terms with examples.

Combination reaction

Combination reaction: When two or more reactants combine in a reaction to form a single product, it is called a combination reaction.

For example: A magnesium strip is heated in the presence of air to form a new product, i.e., magnesium oxide (MgO)

Mg + O₂→ MgO

In the above reaction, the combination of Mg and O₂ leads to the formation of manganese oxide.