Question

Which out of the following is a chemical change?
a) Boiling of water b) mixing of iron filings and sand
c) Burning of candle d) passage of electricity through wires

Answer 1

Answer:

Growth of a plant, rusting of iron, cooking of food, digestion of food, and burning the candle are chemical changes because here is the chemical composition of the substance changes.

Answer 2

Answer:

Hope it helps you guys

Explanation:

So rusting is a chemical change. c) Mixing of iron filings and sand: Here mixing does not lead to any chemical reaction. So, this is an example of only physical change. d) The cooking of food: In cooking, many complex food particles are broken into smaller particles.

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