Question

3. Which type of change, physical or chemical, takes place in each of the following cases? Give
reasons for each.

a. Baking a cake
b. Burning of paper
C. Tearing of paper
d. Breaking of glass​

Answer 1

Answer:

a) chemical change

b) chemical change

c.)physical change

d) physical change

Answer 2

Explanation:

a. Baking of cake → chemical change

• As it is forming a new substance and it can't renewed back.

_____________________

b. Burning of paper → Chemical change

• Forming a new substance and can't be renewed.

___________________________

c. Tearing of paper → Physical change

• No new substance is formed.

___________________________

d. Breaking of glass → physical change.

• As its not forming a new substance.

Key words :

➪ Chemical changes :

• Any changes includes an another substance which is cause for the formation of a new substance and that is irreversible, refers to chemical change

➪ Physical changes :

• Any change without forming a new substance and it is reversible through different processes refers to physical change