| 1 |
The basis to define a temperature scale that is independent of material properties is provided by
|
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle
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| 2 |
A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
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A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
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| 3 |
At absolute temperature, the kinetic energy of the molecules
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A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
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| 4 |
The temperature scale approved in SI units is:
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A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
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| 5 |
According to the second law, which is must to produce work
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A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
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| 6 |
Efficiency of carnot engine is independent of the
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A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
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| 7 |
Truth of kinetic energy is confirmed by:
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A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
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| 8 |
When two objects come to common temperature, the body is said to be in:
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A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
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| 9 |
The pressure exerted by the gas is
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A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
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| 10 |
The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
|
A. 100 K
B. 273 K
C. 0 K
D. -273 K
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| 11 |
When two objects are rubbed together, their internal energy
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A. remains same
B. decreases
C. remains the same then decreases
D. increases
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| 12 |
The nature of thermal radiation is similar to:
|
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
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| 13 |
A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
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A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
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| 14 |
On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
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A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
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| 15 |
The internal energy of a system does not depend upon the
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A. initial state of the system
B. final state of the system
C. path
D. none of them
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| 16 |
Which of the following is a state variable
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A. entropy
B. pressure
C. volume
D. all of them
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| 17 |
The absolute temperature for an ideal gas is
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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
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| 18 |
At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
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A. 81 K
B. 355 K
C. 627 K
D. 627°C
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| 19 |
If a liquid is heated in weightlessness, the heat is transmitted through
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A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
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| 20 |
If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is
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A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
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| 21 |
In which process the condition for the application of Boyle's law on the gas is fulfilled
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A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
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| 22 |
A carnot cycle consists of
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A. One step
B. two step
C. three steps
D. four steps
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| 23 |
The heat required to raise the temperature of one mole of the substance through 1 K is called
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A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
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| 24 |
Pressure may be define as _______ per second per unit area:
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A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
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| 25 |
Absolute zero is considered as that temperature at which:
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A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
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| 26 |
The disorder in the system increases due to the
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A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
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| 27 |
The curve representing an adiabatic process is called
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A. isotherm
B. adiabat
C. adiable
D. none of them
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| 28 |
Amount of heat required to raise the temperature of a body through 1 K is called its
|
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
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| 29 |
We can express the work in term of
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A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
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| 30 |
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
|