Question

Carbon reacts with oxygen to give carbon dioxide. This is an example of:

• A. Displacement reaction
• B. Double displacement reaction
• C. Decomposition reaction
• D. Combination reaction

Answer 1

The correct option is D Combination reaction

If two or more reactants combine to form a single product then it is a combination reaction. The general representation of this reaction is given below:
$\text{A+B}\to \text{AB}$
One mole of carbon reacts with one mole of oxygen to form carbon dioxide. The reaction is as follows:
${\text{C (s) + O}}_2\text{(g)}\to {\text{CO}}_2\text{(g)}$
This is a combination reaction since two reactants are combining to form a single product.