| 1 |
The curve representing an isothermal process is called
|
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
|
| 2 |
The motion of molecules in gases is:
|
A. Orderly
B. Random
C. Circular
D. All of these
|
| 3 |
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
|
| 4 |
The temperature scale approved in SI units is:
|
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
|
| 5 |
If the distance between two charges is doubled, the force between them will become:
|
A. Double
B. Half
C. Three times
D. One fourth
|
| 6 |
The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
|
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
|
| 7 |
The internal energy of an ideal gas system is generally the
|
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
|
| 8 |
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
|
| 9 |
Heat travels through vacuum by
|
A. Conduction
B. Convection
C. Radiation
D. Both A and B
|
| 10 |
On colliding in a closed container, the gas molecules
|
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
|
| 11 |
In thermodynamics, internal energy is the function of
|
A. temperature
B. pressure
C. state
D. none of them
|
| 12 |
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
|
| 13 |
The absolute temperature of the tripple point of water is
|
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
|
| 14 |
We cannot utilize the heat contents of oceans and atmosphere because
|
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
|
| 15 |
In the theory of dimensional analysis, heat may be properly represented by:
|
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
|
| 16 |
The earliest heat engine was
|
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
|
| 17 |
The disorder in the system increases due to the
|
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
|
| 18 |
The pressure exerted by the gas is
|
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
|
| 19 |
On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
|
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
|
| 20 |
Which of the following is a state variable
|
A. entropy
B. pressure
C. volume
D. all of them
|
| 21 |
Triple point of water is
|
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
|
| 22 |
A carnot cycle consists of
|
A. One step
B. two step
C. three steps
D. four steps
|
| 23 |
A real gas can be approximated to an ideal gas at
|
A. Low density
B. High pressure
C. High density
D. Low temperature
|
| 24 |
For making cooking utensils, which of the following pairs of properties is most suited?
|
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
|
| 25 |
The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to
|
A. 300°C
B. 573°C
C. 600°C
D. 743°C
|
| 26 |
The internal energy of a system does not depend upon the
|
A. initial state of the system
B. final state of the system
C. path
D. none of them
|
| 27 |
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
|
| 28 |
When heat is added into the system then change in entropy is
|
A. negative
B. positive
C. zero
D. any one of them
|
| 29 |
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
|
| 30 |
A process is a reversible process, if the entropy of the system
|
A. increases
B. decreases
C. remains constant
D. none of them
|