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
