Question

Q1. Which of the following is a physical change?

a) Rusting of iron

b) Burning of wood

c) Burning of paper

d) Melting of ice


Q2. Ice on heating changes to water and on further heating, it gets converted to

steam. What happens when steam is condensed?

a) A new substance isformed

b) No new substance is formed

c) Gaseous phase changes to liquid phase

d) Both (b) and (c) are correct


Q3. Fill in the blanks.

a) Adding sugar to water to prepare a solution is an example of change.

b) Physical changes are generally in nature.


Q4. Stretching of rubber band is not a physical change. Is the statement True or False?


Q5. Write an activity to show that melting of ice is a physical change.


Q6. Give an example for each of the following cases:

a) Physical changes which are reversible.

b) Physical changes which are not reversible


Q7. Define physical changes.


Q8. Cutting of wood into pieces is a physical change. Explain.


Q9. Tearing of paper is considered to be a physical change. Give reason


Q10. Why blowing a balloon is considered as a physical change?​

Answer 1

Answer:

1.melting of iron

2.d ) both b and c are correct

3.a) physical

4. false

6.a) stretching a rubber band

6b) burning a paper.