Question

B. Classify the following as physical or
chemical changes.
1. crushing a piece of chalk
2. dissolving sugar in water
3. switching on a bulb
4. cooking idli from batter
5. grinding corn into corn flour
6. knotting a rope
7. souring of milk
8. stitching a shirt
9. painting a wall
10. burning a piece of paper
11. germination of a seed
12. growing a tomato plant
13. baking bread
14. chopping up wood
15. weaving a basket​

Answer 1

Answer:

option 1,3,6,8,15,14 are physical changes

Answer 2

Answer:

1 physical

2 chemical

3chemical

4chemical

5physical

6 physical

7chemical

8 physical

10chemical

11chemical

12chemical

13chemical

14physical

15 physical