| 1 |
The pressure of gas everywhere inside the vessel will be the same provided the gas is of
|
A. Non-uniform density
B. uniform density
C. high density
D. low density
|
| 2 |
A real gas can be approximated to an ideal gas at
|
A. Low density
B. High pressure
C. High density
D. Low temperature
|
| 3 |
The volume of universal gas constant R is:
|
A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
|
| 4 |
Specific heat at constant pressure is greater than the specific heat at constant volume because
|
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
|
| 5 |
Maximum density of H2O is at the temperature
|
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
|
| 6 |
R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
|
A. 2V
B. 3V
C. 0.5V
D. V
|
| 7 |
If the distance between two charges is doubled, the force between them will become:
|
A. Double
B. Half
C. Three times
D. One fourth
|
| 8 |
Rate of diffusion is
|
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
|
| 9 |
The percentage of available heat energy converted into work by a petrol engine is roughly
|
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
|
| 10 |
Since the absolute scale is independent of the property of the working substance, hence, can be applied at
|
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
|
| 11 |
A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
|
A. reversible process
B. irreversible process
C. any one of them
D. none of them
|
| 12 |
Absolute temperature can be calculated by
|
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
|
| 13 |
The disorder in the system increases due to the
|
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
|
| 14 |
If water in a closed bottle is taken up to the moon and opened, the water gets
|
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
|
| 15 |
First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
|
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them
|
| 16 |
The motion of molecules in gases is:
|
A. Orderly
B. Random
C. Circular
D. All of these
|
| 17 |
In the study of thermodynamics, which gas is considered as the working substance
|
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
|
| 18 |
If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
|
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
|
| 19 |
In the reverse process, the working substance passes through the same stages as in the direct process and
|
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
|
| 20 |
At constant temperature, if the density of the gas is increased, its pressure will:
|
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
|
| 21 |
The earliest heat engine was
|
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
|
| 22 |
During the whole carnot cycle
|
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
|
| 23 |
The number of translation degress of freedom for a diatomic gas is
|
A. 2
B. 3
C. 5
D. 6
|
| 24 |
The absolute temperature for an ideal gas is
|
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
|
| 25 |
On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
|
A. outwards
B. inwards
C. in either way
D. none of these
|
| 26 |
Which of the following does not have the same units:
|
A. Work
B. Heat
C. Kinetic energy
D. Power
|
| 27 |
Generally a temperature scale is established by
|
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
|
| 28 |
An isochoric process is one which take place at
|
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
|
| 29 |
Energy gas behaves like an ideal gast at
|
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
|
| 30 |
The ideal gas law is
|
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
|