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 liquid is heated in weightlessness, the heat is transmitted through

Question # 2

Energy gas behaves like an ideal gast at

Question # 3

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

Question # 4

The absolute temperature for an ideal gas is

Question # 5

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 6

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 7

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 8

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

Question # 9

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

Question # 10

Maximum density of H2O is at the temperature

Question # 11

The earliest heat engine was

Question # 12

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

Question # 13

On colliding in a closed container, the gas molecules

Question # 14

A reversible cycle is the one in which

Question # 15

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

Question # 16

The bicycle pump provides a good example of

Question # 17

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

Question # 18

During the whole carnot cycle

Question # 19

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 20

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

Question # 21

If the volume of the gas is to be increased by 4 times, then

Question # 22

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 23

In an adiabatic expansion, the temperature of the gas

Question # 24

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

Question # 25

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

Question # 26

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 27

Truth of kinetic energy is confirmed by:

Question # 28

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

Question # 29

The value of E0in coulomb's law is:

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
2 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
3 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
4 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
5 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
6 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
7 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
8 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
9 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
10 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%

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