| 1 |
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
|
A. 0°C
B. 10°C
C. 17°C
D. 20°C
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| 2 |
What temperature is the same on Celsius scale as well as on Fahrenheit scale?
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A. 32°C
B. -32°C
C. -40°C
D. -212°C
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| 3 |
Absolute temperature can be calculated by
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A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
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| 4 |
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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| 5 |
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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| 6 |
Heat travels through vacuum by
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A. Conduction
B. Convection
C. Radiation
D. Both A and B
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| 7 |
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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| 8 |
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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| 9 |
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
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| 10 |
The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
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A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
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| 11 |
An isochoric process is one which take place at
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A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
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| 12 |
Triple point of water is
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A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
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| 13 |
The temperature of gas is produced by
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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
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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 |
Generally a temperature scale is established by
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A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
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| 16 |
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
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| 17 |
We cannot utilize the heat contents of oceans and atmosphere because
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A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
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| 18 |
The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
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A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
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| 19 |
While deriving the equation for pressure of a gas we consider the
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A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
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| 20 |
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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| 21 |
R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
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A. 2V
B. 3V
C. 0.5V
D. V
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| 22 |
Which of the following does not have the same units:
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A. Work
B. Heat
C. Kinetic energy
D. Power
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| 23 |
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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| 24 |
Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
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A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
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| 25 |
It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of
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A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
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| 26 |
Good absorbers of heat are
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A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
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| 27 |
Average KE of a gas molecule has:
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A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
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| 28 |
Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
|
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
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| 29 |
Generally a temperature scale is established by using certain physical properties of a material which varies
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A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
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| 30 |
The number of translation degress of freedom for a diatomic gas is
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A. 2
B. 3
C. 5
D. 6
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