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

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 2

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 3

In the formula P = N0KT, N0denotes:

Question # 4

If the formula PV = nRT, n denotes:

Question # 5

The relationship between Boltzmann constant k with R and NAis given as:

Question # 6

The unit of thermodynamical scale is

Question # 7

A succession of events which bring the system back to its initial condition is called

Question # 8

The example of irreversible process is

Question # 9

Hotness and coldness of an object is represented in terms:

Question # 10

The earliest heat engine was

Question # 11

Melting point of ice

Question # 12

The ideal gas law is

Question # 13

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

Question # 14

Gas constant per molecule is called:

Question # 15

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

Question # 16

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

Question # 17

The second law of thermodynamics is concerned with the circumstances in which

Question # 18

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 19

At absolute temperature, the kinetic energy of the molecules

Question # 20

Adiabatic change occurs when the gas

Question # 21

A process is a reversible process, if the entropy of the system

Question # 22

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 23

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

Question # 24

In case of an ideal gas, the P.E associated with its molecule is

Question # 25

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 # 26

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 27

The temperature of gas is produced by

Question # 28

During the whole carnot cycle

Question # 29

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

Question # 30

Which of the following is not an example of adiabatic process

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
2 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
3 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
4 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
5 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these
6 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
7 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
8 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
9 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
10 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

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