ECAT Pre Computer Science Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

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ECAT Physics Chapter 11 Heat & Thermodynamics

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Question # 1

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 2

Rate of diffusion is

Question # 3

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 4

Generally a temperature scale is established by

Question # 5

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 6

The number of translation degress of freedom for a diatomic gas is

Question # 7

The Boltzman constant has the value

Question # 8

If the formula PV = nRT, n denotes:

Question # 9

Adiabatic change occurs when the gas

Question # 10

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 11

The motion of molecules in gases is:

Question # 12

The temperature scale approved in SI units is:

Question # 13

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 14

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 15

Which quantity is important in stating the entropy of the system

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 According to the second law, which is must to produce work
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
3 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
4 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
5 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
6 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
7 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
8 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
9 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
10 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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