Question

Which amongst the following changes involves the change in composition?

• A. Burning of wooden logs
• B. Melting of ice
• C. Cutting of wooden logs
• D. Boiling of water

Answer 1

The correct option is A Burning of wooden logs

Composition is a chemical property of a substance and it will change only during a chemical change. This is because in a chemical change new substances are formed mainly due to the change in composition. Among the given options, burning of wooden logs is the only chemical change where new substances like ash, smoke and other byproducts are formed due to the change in its composition. However, melting of ice, cutting of wood and boiling of water are all physical changes which does not affect their composition.