The Three States of Matter - Chapter No 2

Right Answers have been shown below in red color.

1. A substance that is hard, rigid, and has definite volume and shape is called ________.

a) Solid
b) Liquid
c) Gas
d) Molecule

2. A substance that has no definite shape but definite volume, is called ________.

a) Solid
b) Liquid
c) Gas
d) Definite

3. In gases, the molecules occur at a very ________ distance.

a) Close
b) Widely
c) Definite
d) Gas

4. The gases have ________ definite shape.

a) Very
b) So
c) No
d) Substance

5. The solids have ________ shape.

a) Definite
b) Very
c) Shape
d) Container

6. If we increase pressure then we can ________ gases easily.

a) Compress
b) Column
c) Change
d) Measure

7. When compressed gases are suddenly allowed to expand, they cause cooling and this phenomenon is called the ________ effect.

a) Compressed
b) Atmosphere
c) Joule-Thomson
d) Joule-Maxwell

8. In refrigerators, ________ effect is used.

a) Joule-Thomson
b) Individual
c) Original
d) Barometer

9. All gases ________ on heating and contract on cooling.

a) Cold
b) Expand
c) Independent
d) Original

10. In gases, the kinetic energy of molecules increases with ________ of temperature.

a) Decreases
b) Null
c) Increase
d) Balance

11. At constant pressure the volumes of gas ________ by increasing temperature.

a) Increases
b) Decreases
c) Effuse
d) Pressure

12. The force exerted by gas molecules per unit area per second is called ________.

a) Gas volume
b) Gas pressure
c) Gas temperature
d) None of these

13. The formula for the pressure of a gas is ________.

a) P = F / A
b) P = A / F
c) P = FA
d) None of these

14. 1 atmosphere = ________ mm Hg.

a) 670
b) 760
c) 607
d) 706

15. Calculate – 22ºF to Kelvin Scale?

a) 213
b) 233
c) 223
d) 243

16. Calculate 60ºC to Kelvin scale?

a) 343 K
b) 43 K
c) 333 K
d) 34 K

17. The lowest possible value at which molecular motion ceases is called ________.

a) Absolute zero
b) Boyle’s law
c) Constant
d) None of these

18. According to Boyle’s law, “At constant temperature, the volume of a given mass of gas is ______ proportional to the pressure of gas”.

a) Inversely
b) Directly
c) Volume
d) Verification

19. The mathematical form of Boyle’s law is ___________.

a) PV = R
b) PV = constant
c) P / V= R
d) PR = C

20. Charle’s law was introduced in ___________.

a) 1787
b) 1708
c) 1807
d) 2000

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