| 1 |
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
|
| 2 |
The work done on the system by the environment is considered as
|
A. positive
B. negative
C. zero
D. any one of them
|
| 3 |
The ideal gas law is
|
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
|
| 4 |
Electromagnetic waves emitted by hot bodies are called:
|
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
|
| 5 |
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
|
| 6 |
At constant volume temperature is increased. Then
|
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
|
| 7 |
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
|
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
|
| 8 |
A carnot cycle consists of
|
A. One step
B. two step
C. three steps
D. four steps
|
| 9 |
The motion of molecules in gases is:
|
A. Orderly
B. Random
C. Circular
D. All of these
|
| 10 |
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
|
| 11 |
The curve representing an adiabatic process is called
|
A. isotherm
B. adiabat
C. adiable
D. none of them
|
| 12 |
Gas constant per molecule is called:
|
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
|
| 13 |
When heat is removed from the system
|
A. negative
B. positive
C. zero
D. any one of them
|
| 14 |
A typical four stroke petrol engine undergoes how many successive processes in each cycle
|
A. one
B. two
C. three
D. four
|
| 15 |
Pressure of a gas at constant volume is proportion to
|
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
|
| 16 |
In an adiabatic expansion, the temperature of the gas
|
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
|
| 17 |
An isochoric process is one which take place at
|
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
|
| 18 |
The absolute temperature for an ideal gas is
|
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
|
| 19 |
Which of the following is not an example of adiabatic process
|
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them
|
| 20 |
In a heat engine, heat is supplied by the
|
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
|
| 21 |
In the study of thermodynamics, which gas is considered as the working substance
|
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
|
| 22 |
Maximum density of H2O is at the temperature
|
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
|
| 23 |
On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
|
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
|
| 24 |
Hotness and coldness of an object is represented in terms:
|
A. Heat
B. Temperature
C. Chemical energy
D. None of these
|
| 25 |
Melting point of ice
|
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
|
| 26 |
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
|
| 27 |
The value of E0in coulomb's law is:
|
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
|
| 28 |
Generally a temperature scale is established by
|
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
|
| 29 |
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
|
| 30 |
We can express the work in term of
|
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
|