Question

Which of the following are examples of chemical reaction?

• A. Conversion of steam into water
• B. Rusting of iron
• C. Cutting of wood
• D. All of the above

Answer 1

The correct option is B Rusting of iron

Rusting of iron is an example of a chemical reaction.

A new product is formed in a chemical reaction.

Cutting of wood is a physical change as the chemical composition remains the same, only the size of the wood changes.

Conversion of steam to water is a physical change as there is no change in chemical nature of the substance.

Rusting of iron is a chemical reaction as the iron forms hydrated iron oxide (new compound) in the presence of moisture.