Question

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

Answer 1

Explanation:

b

c

e

it's a chemical change

Answer 2

Answer:

growth of plant, cooking of food, digestion of food, burning of candle are chemical changes. Remaining all are physical changes. But there is an exception in burning of candle because it involves both physical and chemical changes