ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

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

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

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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Question # 1

A real gas can be approximated to an ideal gas at

Question # 2

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

Question # 3

Maximum density of H2O is at the temperature

Question # 4

A diatomic gas molecule has

Question # 5

If the distance between two charges is doubled, the force between them will become:

Question # 6

In an adiabatic process the work is done at the expense of the

Question # 7

The only significant motion possessed by the mono-atomic gas represented is:

Question # 8

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

Question # 9

The motion of molecules in gases is:

Question # 10

Hotness and coldness of an object is represented in terms:

Question # 11

The ideal gas law is

Question # 12

The unit of thermodynamical scale is

Question # 13

At absolute temperature, the kinetic energy of the molecules

Question # 14

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 15

Heat travels through vacuum by

Question # 16

Which of the following is not an example of adiabatic process

Question # 17

The absolute temperature of the tripple point of water is

Question # 18

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 19

The absolute temperature for an ideal gas is

Question # 20

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 # 21

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 22

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 23

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

Question # 24

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 25

The internal energy of an ideal gas system is generally the

Question # 26

Brownian motion increases due to

Question # 27

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 28

The example of irreversible process is

Question # 29

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 30

Internal energy is the sum of all the forms of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
2 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
3 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
4 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
5 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
6 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
7 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
8 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
9 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
10 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these

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