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

In an ideal gas, the molecules have:

Question # 2

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 3

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 4

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 5

Hotness and coldness of an object is represented in terms:

Question # 6

In a heat engine, heat is supplied by the

Question # 7

Carnot heat engine only used

Question # 8

The process which is carried out at constant temperature is known as

Question # 9

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

Question # 10

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 11

The example of reversible process is

Question # 12

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 13

During the whole carnot cycle

Question # 14

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 15

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 16

Maximum density of H2O is at the temperature

Question # 17

Good absorbers of heat are

Question # 18

A heat engine is that which converts

Question # 19

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 # 20

The temperature scale approved in SI units is:

Question # 21

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

Question # 22

Pressure of a gas at constant volume is proportion to

Question # 23

In an adiabatic expansion, the temperature of the gas

Question # 24

The work done on the system by the environment is considered as

Question # 25

The bicycle pump provides a good example of

Question # 26

Boyle's law is applicable in

Question # 27

Truth of kinetic energy is confirmed by:

Question # 28

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 29

The concept of entropy was introduced into the study of thermodynamics in

Question # 30

Which of the following does not have the same units:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
2 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
3 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
4 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
5 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
6 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
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 process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
9 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
10 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them

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