Question

Select from the following a process in which a combination reaction is involved:

• A. Black and White photography
• B. Burning of coal
• C. Burning of methane
• D. Digestion of food

Answer 1

Answer: (B)

Burning of coal

Answer 2

In burning of coal, carbon reacts with oxygen to form carbon dioxide, which is a combination reaction:
$\text{C (s)} + \text{O}_2 \, \rightarrow \, \text{CO}_2 \, (\text{g}).$
Two reactants combine to form a single product.