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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Question 1 of 10
1. Question
Which of the following substances exhibit the strongest intermolecular forces of attraction?
Correct
Since, intermolecular forces of attraction are strongest in solid. Sugar is solid.
Incorrect
Since, intermolecular forces of attraction are strongest in solid. Sugar is solid.
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Question 2 of 10
2. Question
Which condition out of the following increase the evaporation of water?
Correct
Increase in temperature of water will also increase the evaporation of water.
Incorrect
Increase in temperature of water will also increase the evaporation of water.
-
Question 3 of 10
3. Question
The interparticle forces of attraction are weakest in
Correct
Gases have weakest force of attraction between their particles. Therefore, Particles of Hydrogen gas can move freely.
Incorrect
Gases have weakest force of attraction between their particles. Therefore, Particles of Hydrogen gas can move freely.
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Question 4 of 10
4. Question
Among the three physical states
Correct
Both liquids and gases can flow as their particles are not that much tightly packed than solid.
Incorrect
Both liquids and gases can flow as their particles are not that much tightly packed than solid.
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Question 5 of 10
5. Question
In summer, we prefer wearing
Correct
White cotton clothes are maximum porous and provides air circulation. In summer, we get maximum sweat. Since, cotton clothes are porous and cooling is caused during evaporation, these clothes provide maximum relief in summer.
Incorrect
White cotton clothes are maximum porous and provides air circulation. In summer, we get maximum sweat. Since, cotton clothes are porous and cooling is caused during evaporation, these clothes provide maximum relief in summer.
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Question 6 of 10
6. Question
The diameters of the molecules of matter are about
Correct
The diameters of the molecules of matter is about 1 nanometre.
Incorrect
The diameters of the molecules of matter is about 1 nanometre.
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Question 7 of 10
7. Question
Which of the following is not matter?
Correct
Matter is anything which occupies space. Excitement is a feeling which can’t physically occupies space
Incorrect
Matter is anything which occupies space. Excitement is a feeling which can’t physically occupies space
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Question 8 of 10
8. Question
Liquefaction of all gases can be achieved by
Correct
Liquefaction of all gases can be achieved by decreasing the temperature and increasing the pressure. Increasing the pressure will decrease the volume of gases and thus liquefying the gases.
Incorrect
Liquefaction of all gases can be achieved by decreasing the temperature and increasing the pressure. Increasing the pressure will decrease the volume of gases and thus liquefying the gases.
-
Question 9 of 10
9. Question
The SI unit of latent heat of vaporisation is
Correct
SI unit of latent heat of vaporisation is measured in Joule/kg.
Incorrect
SI unit of latent heat of vaporisation is measured in Joule/kg.
-
Question 10 of 10
10. Question
Latent heat of fusion is
Correct
Latent heat of fusion is heat supplied to convert solid into its liquid state. (Definition)
Incorrect
Latent heat of fusion is heat supplied to convert solid into its liquid state. (Definition)