state gov MP Forest Guard and Jail Prahari Mock Test 2023 General Science Chemistry Chemical Reaction
Which of the following are chemical changes?
1. cooking of food
2. Digestion of food
3. Freezing of water
4. water is heated up
Select the correct answer using the codes given below.
1
1 and 2
2
1, 2 and 3
3
3 and 4
4
All of the above