Question

13. Classify each of the following as a physical or chemical change. Give reasons.

a. Drying of a shirt in the sun.

b. Rising of hot air over a radiator.

c. Buring of kerosene in a lantern.

d. Change in the colour of black tea on adding lemon juice in it.

Answer 1

option 'b,d' is the the chemical changes and 'a, c' are physical changes

Answer 2

option b, c are chemical and a, c are physical