Online Test of Chapter 1 Matter in our Surrounding 2 Science| Class 9th

Questions :

1. Which of the following substances exhibit the strongest intermolecular forces of attraction?
a. water(l)
b. ethanol(l)
c. CO2(g)
d. sugar(s)

2. Which condition out of the following increase the evaporation of water?
(a) Increase in temperature of water
(b)Decrease in temperature of water
(c) Adding common salt to water
(d)Less exposed surface area of water

3. The interparticle forces of attraction are weakest in
(a) water
(b) alcohol
(c) sodium chloride
(d) hydrogen gas

4. Among the three physical states
(a) Both solids and liquids show fluidity
(b) Both liquids and gases show fluidity
(c) Only liquids show fluidity
(d) Only gases show fluidity

5. In summer, we prefer wearing
(a) dark nylon clothes
(b) white cotton clothes
(c) white silk clothes
(d) dark silk clothes

6. The diameters of the molecules of matter are about
a. 10-10 m
b. 10-8 m
C. 10-11 m
d. 10-9 m

7. Which of the following is not matter?
(a) table
(b) excitement
(c) rock
(d) sea

8. Liquefaction of all gases can be achieved by
(a) increasing the pressure
(b) decreasing the temperature
(c) decreasing the temperature and increasing the pressure
(d) increasing the temperature and decreasing the pressure

9. The SI unit of latent heat of vaporisation is
a. J g-1
b. kJ kg-1
c. J kg-1
d. cal g-1

10. Latent heat of fusion is
(a) heat supplied to increase the temperature
(b) heat supplied to decrease the temperature
(c) heat supplied to convert a solid into its gaseous state.
(d) heat supplied to convert solid into its liquid state.

Chapter 1 Matter in our Surroundings Quiz 2| Class 9th

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