CBSE TEST PAPER Chapter : Matter in Our Surroundings

CBSE TEST PAPER  Chapter : Matter in Our Surroundings

1. State whether True or False. (i) Water has no definite shape; therefore, it is not matter. (ii) Gases expand to fill the space available.

2. A substance has a definite volume, but no definite shape. State whether this substance is solid, liquid or gas.

3. Which physical state of matter is the densest?

4.What are the different factors affecting evaporation?

5.Give two reasons as to why a block of ice is considered as matter.

6. Why does matter change state?

7. It is observed that water boils at lower temperature at higher altitudes. Why?

8. If some alcohol is rubbed on the hand, the rubbed portion of the hand feels cool. Why?

9. Name the following. (i) State of matter having the maximum intermolecular space (ii) Force between particles of matter (iii) State of matter with only one free surface

10. A large crystal of potassium permanganate is kept in a glass beaker containing water. This setup is then left undisturbed for an hour. The solution undergoes a change in colour.

(i) What is this change in colour?(ii) Why does such a change take place?