| 1 |
At O° K which of the following properties of a gas will be zero?
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A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
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| 2 |
Internal energy is the sum of all the forms of
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A. K.E
B. P.E
C. both of them
D. none of them
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| 3 |
The volume of universal gas constant R is:
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A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
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| 4 |
If an amount of heat enters the system it could
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A. decrease the internal energy
B. not change the internal energy
C. increase the internal energy
D. none of them
|
| 5 |
The percentage of available heat energy converted into work by a diesel engine is roughly
|
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
|
| 6 |
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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| 7 |
10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
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A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None
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| 8 |
In an adiabatic process the work is done at the expense of the
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A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
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| 9 |
Pressure of a gas at constant volume is proportion to
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A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
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| 10 |
In case of an ideal gas, the P.E associated with its molecule is
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A. maximum
B. zero
C. minimum
D. not fixed
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| 11 |
The state in which ice, water and vapour coexists in equilibrium is called
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A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
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| 12 |
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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| 13 |
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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| 14 |
In thermodynamics, internal energy is the function of
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A. temperature
B. pressure
C. state
D. none of them
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| 15 |
If the volume of the gas is to be increased by 4 times, then
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A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
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| 16 |
The curve representing an isothermal process is called
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A. adiabat
B. isotherm
C. fixed temperature
D. none of them
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| 17 |
The value of E0in coulomb's law is:
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A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
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| 18 |
The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to
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A. 0°C
B. 10°C
C. 17°C
D. 20°C
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| 19 |
The nature of thermal radiation is similar to:
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A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
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| 20 |
Energy gas behaves like an ideal gast at
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A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
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| 21 |
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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| 22 |
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
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| 23 |
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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| 24 |
At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
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A. Double
B. Remains constant
C. Half
D. None of these
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| 25 |
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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| 26 |
The bicycle pump provides a good example of
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A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them
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| 27 |
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 %
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| 28 |
On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
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A. adiabatically
B. isothermally
C. isochorically
D. isobarically
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| 29 |
One kilogram of different substances contain
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A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
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| 30 |
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
|