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

We cannot utilize the heat contents of oceans and atmosphere because

Question # 2

When two objects are rubbed together, their internal energy

Question # 3

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 4

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 5

The internal energy of an ideal gas system is generally the

Question # 6

Which of the following is not an assumption of kinetic energy

Question # 7

Truth of kinetic energy is confirmed by:

Question # 8

The product of the pressure and volume of an ideal gas is

Question # 9

Sadi carnot described an ideal heat engine in

Question # 10

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

Question # 11

According to the second law, which is must to produce work

Question # 12

The nature of thermal radiation is similar to:

Question # 13

According to kinetic theory of gases, molecules of a gas behave like

Question # 14

An isochoric process is one which take place at

Question # 15

A heat engine is that which converts

Question # 16

The earliest heat engine was

Question # 17

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 18

The behaviour of gases is well accounted by the kinetic theory based on

Question # 19

The temperature scale approved in SI units is:

Question # 20

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 21

While deriving the equation for pressure of a gas we consider the

Question # 22

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

Question # 23

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

Question # 24

Triple point of water is

Question # 25

Real gases strictly obey gas law at:

Question # 26

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 27

The Boltzman constant has the value

Question # 28

Generally a temperature scale is established by

Question # 29

Absolute zero is considered as that temperature at which:

Question # 30

In a heat engine, heat is supplied by the

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
2 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
3 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
4 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
5 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
6 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
7 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
8 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
9 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
10 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
A. 0 J
B. 2 J
C. 5 J
D. 10 J

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