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 all natural processes where heat flows from one system to another, there is always a net

Question # 2

In thermodynamics, internal energy is the function of

Question # 3

The internal energy of an ideal gas system is generally the

Question # 4

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

Question # 5

Brownian motion increases due to

Question # 6

A real gas can be approximated to an ideal gas at

Question # 7

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

Question # 8

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

Question # 9

In a heat engine, heat is supplied by the

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

When heat is removed from the system

Question # 14

Rice takes longest to cook

Question # 15

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

Question # 16

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

Question # 17

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 18

Electromagnetic waves emitted by hot bodies are called:

Question # 19

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

Question # 20

The motion of molecules in gases is:

Question # 21

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 22

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

Question # 23

In the formula P = N0KT, N0denotes:

Question # 24

We cannot utilize the heat contents of oceans and atmosphere because

Question # 25

Sadi carnot described an ideal heat engine in

Question # 26

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 27

The absolute temperature for an ideal gas is

Question # 28

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

Question # 29

At absolute temperature, the kinetic energy of the molecules

Question # 30

The earliest heat engine was

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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 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
3 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
4 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
5 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
6 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
7 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
8 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
9 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
10 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these

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