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

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

Question # 2

The basis to define a temperature scale that is independent of material properties is provided by

Question # 3

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

Question # 4

Average KE of a gas molecule has:

Question # 5

One mole of any substance contain

Question # 6

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 # 7

Which of the following is not an assumption of kinetic energy

Question # 8

The curve representing an isothermal process is called

Question # 9

The nature of thermal radiation is similar to:

Question # 10

The internal energy of an ideal gas system is generally the

Question # 11

The disorder in the system increases due to the

Question # 12

A process in which no heat enters or leaves the system is called

Question # 13

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 14

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

Question # 15

In a heat engine, heat is supplied by the

Question # 16

For the working of a heat engine, there must be

Question # 17

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

Question # 18

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

Question # 19

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 # 20

The Boltzman constant has the value

Question # 21

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

Question # 22

At constant volume temperature is increased. Then

Question # 23

A heat engine is that which converts

Question # 24

A diatomic gas molecule has

Question # 25

In thermodynamics, internal energy is the function of

Question # 26

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 27

The temperature scale approved in SI units is:

Question # 28

The rate of change of momentum of a molecule is equal to:

Question # 29

The earliest heat engine was

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
2 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
3 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
4 The process which is carried out at constant temperature is known as
A. adiabatic process
B. isothermal process
C. isochoric process
D. none of them
5 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
6 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
7 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
8 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
9 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
10 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

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