Question

13) Classify the following as physical or chemical change:
i) Digestion of food
i) growth of tree
iii) formation of water vapour
iv) burning of candle​

Answer 1

Answer:

1) chemical change

2) growth of tree is both physical and chemical change

3) physical change

4) burning of candle is both physical and chemical change

Answer 2

Answer:

Chemical change : (i) Digestion of food

Physical change : (iii) formation of water vapour

Both physical as well as chemical change :

(ii) growth of tree

(iv) burning of candle