Question

Q. 11. Which of the following are
chemical changes?
(a) Growth of a plant
(6) Rusting of iron
(c) Mixing of iron filings and sand
(d) Cooking of food
(e) Digestion of food
(A) Freezing of water
(g) Burning of a candle​

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:

Chemical changes:

a, b, d, e, g