Note: Correct answers are marked in
green
1.
Which of the following is not an effect of heat?
A. Change
of temperature
B.
Melting
C.
Temporary madness
D.
Expansion
E.
Compression
2.
A cylinder contains oxygen at the temperature of 20oC
and a pressure of 15atm in a volume of 100L. A piston is lowered into the
cylinder decreasing the volume occupied by the gas to 80L and raising the
temperature to 25oC. Assuming oxygen behaves like an ideal gas
under this condition, what is the pressure?
A.
21.1atm
B.
19.1atm
C.
23.6atm
D.
11.23atm
3.
Calculate Cv of oxygen if their ratio is 1.40 and the
density of oxygen is 1.43Kgm-3 at STP, the pressure at
1atm = 1.01 �
105 and the molar mass of oxygen = 32�
10-3
A.
2.87
B.
2.05
C.
1.87
D.
0.75
4.
If a container is filled with ice to the brim, what
happens to the level of water when the ice completely melts?
A. The
water in the glass outflows.
B. The
level of water drops.
C. The level of water
remains unchanged.
D. The
level of water goes up
5.
The Pressure of a constant volume gas thermometer is
1500N/m2 at 28oC. What will be the temperature of
the gas when the pressure increases by
1/3atm?
A.
401K
B.
500K
C.
104K
D.
45K
6.
Which of the following distinguishes between the concepts of
boiling and evaporation?
(i)
A liquid evaporate from its surface alone whereas boiling takes
place throughout the volume
(ii)
Boiling takes place when saturated vapour pressure (SVP) of the
liquid is equal to the atmospheric pressure;
(iii)
Boiling occur at specific temperature
(iv)
Boiling is a microscopic phenomenon
A. I, II, III and
IV
B. I and
IV only
C. I and
II only
D. I, II, & III
only
E.
IV only
7.
If the mean square speed of hydrogen molecules at 40K was 50m/s.
What will be their root mean square speed at 300K? Assuming there is no
change in volume of the cylinder
A.
54.8m/s
B.
48.4m/s
C.
44.8m/s
D.
24.7m/s
8.
From the following speed 3, 4, 9, 5, 7, 6, 12 Compute the Root Mean
Square velocity
A.
51.4
B.
7.17
C.
22.51
D.
12.34
9.
Which of these is not a macroscopic property of
matter?
A.
Pressure
B.
Volume
C.
Mass
D.
Temperatur
10.
Which is not an example of adiabatic expansion?
A.
Expansion of steel in the cylinder of steel engine
B.
Expansion of hot gases in an internal combustion engine
C.
Compression of air in a diesel engine/in air compressor
D. Melting of
ice
11.
Nine particles have speeds of 5, 8, 12, 12, 12, 14, 14, 17, 10.
Find the root square speed
A.
12.0m/s
B.
13.3m/s
C.
14.2m/s
D.
18.2m/s
E.
20.2m/s
12.
Substance which breaks just after reaching the elastic limit are
called _____
A.
Plastic substance
B.
Ductile substances
C. Brittle
substances
D.
Inelastic substances
E.
Elastic substances
13.
The opposing force which one layer of a liquid exert on another is
called
A.
Adhesion
B.
Capillarity
C.
Limiting force
D. Viscosity
14.
The tendency of liquid to rise up a narrow tube when one end of the
tube is immersed in the liquid is called____
A.
Surface tension
B.
Capillarity
C.
Viscosity
D.
Upthrust
E.
Liquid tension
15.
The kinetic theory attributes gas pressure to bombardment of the
walls of the containing vessels by molecules only
A.
True
B.
False
16.
Calculate the root mean square speed of smoke particles of mass 5.
0 x 10-14 in air at 0oC and 1atmospheric
pressure
A.
6.5
B.
5.4
C.
4.6
D. 2.7
E.
1.5
17.
In the process of evaporation, a state of affairs is reached at the
surface of the liquid when molecules are arriving and department at the
same rate. This state of affairs is called___?
A.
Unstable equilibrium
B. Stable
equilibrium
C. Dynamic
equilibrium
D. Zeroth
Law
18.
An ideal gas undergoes an isothermal expansion at temperature
T1 during which its volume change from V1 to V2. How much work
is done by the gas?
A. nRT
lnP1/P2
B. nRT ln
P2/P1
C. P1V1 =
P2V2
D.
nRT/V
E.
PdV/T
19.
The volume of a given mass of gas at constant pressure is
8.19lit at 0oC. What will be its volume at
20oC?
A.
8790cm3
B.
500cm3
C.
200cm3
D.
400cm3
E.
20cm3
20.
At the boiling point of a liquid, the Saturated Vapour
Pressure of the Liquid (SVP)
A. SVP
< Atmospheric Pressure
B. SVP = Atmospheric
Pressure
C. SVP
> Atmospheric Pressure
D. SVP =
0
E.
21.
When an ideal gas undergoes a slow adiabatic volume change, for
which Qo is its temperature and volume are related by
A.
VyT
B.
TVy-1
C. VT
D.
TVy
E.
TyV
22.
An adiabatic system is an isolated system in which
A. no heat leaves the
system or enters the system
B. Heat
leaving the system is the same with those entering the system
C. Heat
leaving the system is less than those entering
D. Heat
leaving the system is greater than those entering
23.
When there is increase in thermal energy by the system it means
work is been done on the system. But when there is decrease in thermal
energy of the system, it means work is been done by the
system.
A.
True
B.
False
C.
Partially True
D. Non is
applicable
24.
In which of this gas law is temperature a constant
term?
A.
Pressure law
B.
Boyle�s law
C.
Charles Law
D.
Grahams Law
25.
Reynolds number determines the nature of the flow of liquid
through a fluid
A.
True
B.
False
26.
The excess pressure �P� within a bubble of a radius 0.1mm in water.
Take surface tension T = 72.7 x 10-3 (A bubble of �A� within
liquid that has liquid A surface = 2T/r) where T = 72.7 x 10-3,
r = 0.1/1000 = 10-4
A.
1454N/m
B.
1545N/m
C.
1000N/m
D.
500N/m
27.
Which of these
is not a type of modulus?
A. Young
Modulus (E)
B. Shear
Modulus (e)
C. Bulk
modulus (B)
D. Surface Modulus
28.
The pressure of one mole of an ideal gas of volume
102m3 at a temperature of 27�C is [ gas constant =
8.3J mol]
A.
2.24 x l03 Nm
B. 2.24 x
I02 Nm
C.
2.49 x
105 Nm-
D. 2.49 x
106Nm
29.
Which of the following
has no effect on radiation?
A. Density.
B.
Temperature.
C.
Surface area.
D. Nature
of the surface.
30.
I. Change of state II. Diffusion Ill. Radiation
IV. Osmosis Which of the processes above can be explained using the
kinetic theory?
A. I, II,
III and IV
B. I, II
and Ill
C. I, Ill
and IV
D. I, II and
IV
31.
The change in volume of a gas when it pressure was increased to
20N/m2 is 2m3 Calculate the work done
A.
40J
B.
10J
C.
160J
D.
800J
32.
If the pressure of the vapour on top of an enclosed liquid is equal
to the atmospheric pressure, what will be the temperature of the liquid
enclosed?
A. Room
temperature
B. Boiling point.
C.
Freezing point.
D.
Standard temperature.
33.
It is observed that water will wet a clean glass because the
A.
cohesion of water to glass is stronger than the cohesion of water
molecules
B.
adhesion of water molecules is weaker than the cohesion of water to
glass
C.
cohesion of water to glass is weaker than the cohesion of water
molecules
D. Adhesion of water
molecules is stronger than the cohesion of water molecules.
34.
The kinetic theory attributes gas pressure to bombardment of the
walls of the containing vessels by molecules only
A.
True
B.
False