Question

classify the following changes as physical or chemical changes .
1 charring of sugar
2 digestion of food
3 Burning of butter
4 mixing oil with water
5 Fermentation
6 Rusting of iron
7 Drying of wet clothes​

Answer 1

Answer:

1 chemical

2 chemical

3 chemical

4 chemical

5 physical

6 chemical

7 physical

Answer 2

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.