| 1 |
What temperature is the same on Celsius scale as well as on Fahrenheit scale?
|
A. 32°C
B. -32°C
C. -40°C
D. -212°C
|
| 2 |
At what temperature the adiabatic change is equivalent to the isothermal change?
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A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
|
| 3 |
If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
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A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
|
| 4 |
The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
|
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
|
| 5 |
The rate of change of momentum of a molecule is equal to:
|
A. Pressure
B. Work
C. Density
D. Force
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| 6 |
Sadi carnot described an ideal heat engine in
|
A. 1820
B. 1840
C. 1860
D. 1880
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| 7 |
The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
|
A. 70%
B. 100%
C. 35%
D. 38%
|
| 8 |
In an adiabatic expansion, the temperature of the gas
|
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
|
| 9 |
Heat travels through vacuum by
|
A. Conduction
B. Convection
C. Radiation
D. Both A and B
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| 10 |
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
|
| 11 |
On a cold morning a metal surface will fell colder to touch than a wooden surface, because
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A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
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| 12 |
According to kinetic theory of gases, molecules of a gas behave like
|
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
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| 13 |
The work done on the system by the environment is considered as
|
A. positive
B. negative
C. zero
D. any one of them
|
| 14 |
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
|
| 15 |
Real gases strictly obey gas law at:
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A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
|
| 16 |
If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then
|
A. Cp- Cv= R
B. Cp- Cv < R
C. Cp- Cv = 0
D. Cp- Cv > R
|
| 17 |
Hotness and coldness of an object is represented in terms:
|
A. Heat
B. Temperature
C. Chemical energy
D. None of these
|
| 18 |
When two objects are rubbed together, their internal energy
|
A. remains same
B. decreases
C. remains the same then decreases
D. increases
|
| 19 |
Internal energy is the sum of all the forms of
|
A. K.E
B. P.E
C. both of them
D. none of them
|
| 20 |
In which process the condition for the application of Boyle's law on the gas is fulfilled
|
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
|
| 21 |
The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
|
A. 546 K
B. 273 K
C. 546°C
D. 273°C
|
| 22 |
In case of an ideal gas, the P.E associated with its molecule is
|
A. maximum
B. zero
C. minimum
D. not fixed
|
| 23 |
First law of thermodynamics is consequence of conservation of
|
A. Work
B. Energy
C. Heat
D. All of these
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| 24 |
A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
|
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
|
| 25 |
Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
|
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
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| 26 |
In an ideal gas, the molecules have:
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A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
|
| 27 |
In a heat engine, heat is supplied by the
|
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
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| 28 |
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
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| 29 |
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
|
| 30 |
The temperature of gas is produced by
|
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
|