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 absolute temperature for an ideal gas is

Question # 2

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

Question # 3

Pressure exerted by a gas is

Question # 4

Pressure of a gas at constant volume is proportion to

Question # 5

Hotness and coldness of an object is represented in terms:

Question # 6

An isochoric process is one which take place at

Question # 7

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 8

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 9

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

Question # 10

Which quantity is important in stating the entropy of the system

Question # 11

Energy gas behaves like an ideal gast at

Question # 12

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

Question # 13

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

Question # 14

In thermodynamics, internal energy is the function of

Question # 15

Rice takes longest to cook

Question # 16

In a heat engine, heat is supplied by the

Question # 17

The curve representing an isothermal process is called

Question # 18

Melting point of ice

Question # 19

First law of thermodynamics is consequence of conservation of

Question # 20

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

Question # 21

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

Question # 22

Triple point of water is

Question # 23

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 24

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

Question # 25

A heat engine is that which converts

Question # 26

The absolute temperature of the tripple point of water is

Question # 27

A carnot cycle consists of

Question # 28

At constant volume temperature is increased. Then

Question # 29

In an ideal gas, the molecules have:

Question # 30

The Boltzman constant has the value

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
2 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
3 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
4 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
5 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
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
6 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
7 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
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
8 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
9 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
10 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power

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