Chemical and physical changes - Jamb Chemistry Past Questions and Answers

Question 11:

• JAMB 2019

Which of the following is a physical change?

A. Exposing white phosphorus to air
B. Burning kerosene
C. Dissolving calcium in water
D. Freezing ice cream

Question 12:

• JAMB 2021

Which of the following are chemical changes?
I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up

A. I and II
B. I, II, and III
C. III and IV
D. All of the above