| 1 |
The number of translation degress of freedom for a diatomic gas is
|
A. 2
B. 3
C.5
D. 6
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| 2 |
If a liquid is heated in weightlessness, the heat is transmitted through
|
A. Conduction
B. Convection
C.Radiation
D. Neither, because the liquid cannot be heated in weightlessness
|
| 3 |
In a heat engine, heat is supplied by the
|
A. cold reservoir
B. sink
C.hot reservoir
D. none of them
|
| 4 |
Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
|
A. N = nNAm = MNA
B. n = N NA, M = mNA
C.M = NA/N , NA= m/n
D. N = nNA, M = mNA
|
| 5 |
The state in which ice, water and vapour coexists in equilibrium is called
|
A. zero degree celsius
B. zero degree fahrenheit
C.absolute zero
D. 373 K
|
| 6 |
The unit of thermodynamical scale is
|
A. centigrade
B. fahrenheit
C.kelvin
D. none of them
|
| 7 |
We can express the work in term of
|
A. directly measurable variables
B. indirectly measurable variables
C.either of them
D. both of them
|
| 8 |
Triple point of water is
|
A. 273.16°F
B. 372.16K
C.273.16°F
D. 273.16
|
| 9 |
The bicycle pump provides a good example of
|
A. first law of thermodynamics
B. second law of thermodynamics
C.third law of thermodynamics
D. none of them
|
| 10 |
When two objects come to common temperature, the body is said to be in:
|
A. Static equilibrium
B. Dynamic equilibrium
C.Thermal equilibrium
D. None of these
|
| 11 |
The example of reversible process is
|
A. an explosion
B. changes occur suddenly
C.slow compression of a gas
D. all of them
|
| 12 |
Carnot heat engine only used
|
A. isothermal processes
B. adiabatic processes
C.both of them
D. none of them
|
| 13 |
Pressure may be define as _______ per second per unit area:
|
A. Change in force
B. Change in momentum
C.Change in energy
D. Work done
|
| 14 |
If the distance between two charges is doubled, the force between them will become:
|
A. Double
B. Half
C.Three times
D. One fourth
|
| 15 |
Good absorbers of heat are
|
A. Poor emitters
B. Non emitters
C.Good emitters
D. Highly polarized
|
| 16 |
The behaviour of gases is well accounted by the kinetic theory based on
|
A. microscopic approach
B. macroscopic approach
C.both of them
D. none of them
|
| 17 |
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
|
| 18 |
Pressure exerted by a gas is
|
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C.Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
|
| 19 |
Real gases strictly obey gas law at:
|
A. High pressure and low temperatures
B. Low pressures and high temperatures
C.High pressures and high temperatures
D. None of these
|
| 20 |
At what temperature the adiabatic change is equivalent to the isothermal change?
|
A. Zero degree Celsius
B. Zero Kelvin
C.Critical temperature
D. Above critical temperature
|
| 21 |
The second law of thermodynamics is concerned with the circumstances in which
|
A. heat can be converted into work
B. direction of flow of heat
C.none of them
D. both of them
|
| 22 |
In all natural processes where heat flows from one system to another, there is always a net
|
A. decrease in entropy
B. increase in entropy
C.decrease or increase in entropy
D. none of them
|
| 23 |
The product of the pressure and volume of an ideal gas is
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A. A constant
B. Approximately equal to the universal gas constant
C.Directly proportional to its temperature
D. Inversely proportional to its temperature
|
| 24 |
Maximum density of H2O is at the temperature
|
A. 32°F
B. 39.2°F
C.42°F
D. 4°F
|
| 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 |
Truth of kinetic energy is confirmed by:
|
A. Diffusion of gases
B. Brownian motion
C.Both A and B
D. None of these
|
| 27 |
The Boltzman constant has the value
|
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C.1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
|
| 28 |
In the theory of dimensional analysis, heat may be properly represented by:
|
A. ML2T-2
B. MT-2
C.ML-1T-1
D. None of these
|
| 29 |
Which of the following is not an assumption of kinetic energy
|
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C.collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
|
| 30 |
The motion of molecules in gases is:
|
A. Orderly
B. Random
C.Circular
D. All of these
|