Question

Q13. Which of the following is the chemical change:

a. Growth of plant.

b. Rusting of iron

c. Cooking of food

d. Freezing of water

e. Burning of a candle

f. Mixing of iron fillings and sand

g. Digestion of food

Answer 1

option no. a, b, c, e, g

Answer 2

Among these Rusting of iron, cooking of food, Burning of a candle are chemical changes.