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 motion of molecules in gases is:

Question # 2

One mole of any substance contain

Question # 3

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 # 4

Good absorbers of heat are

Question # 5

We cannot utilize the heat contents of oceans and atmosphere because

Question # 6

Melting point of ice

Question # 7

Pressure of a gas at constant volume is proportion to

Question # 8

Real gases strictly obey gas law at:

Question # 9

In a heat engine, heat is supplied by the

Question # 10

When two objects come to common temperature, the body is said to be in:

Question # 11

The volume of universal gas constant R is:

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

The internal energy of an ideal gas system is generally the

Question # 14

A heat engine is that which converts

Question # 15

The relationship between Boltzmann constant k with R and NAis given as:

Question # 16

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

Question # 17

The example of irreversible process is

Question # 18

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

Question # 19

Rice takes longest to cook

Question # 20

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 21

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

Question # 22

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 23

Which of the following is not an example of adiabatic process

Question # 24

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

Question # 25

The temperature of gas is produced by

Question # 26

The value of E0in coulomb's law is:

Question # 27

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

Question # 28

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 29

The nature of thermal radiation is similar to:

Question # 30

If an amount of heat enters the system it could

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
2 The percentage of available heat energy converted into work by a petrol engine is roughly
A. 35 %
B. 40 %
C. 35 to 40 %
D. 25 %
3 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
4 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
5 The basis to define a temperature scale that is independent of material properties is provided by
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle
6 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
A. A greater than than of B
B. A is equal to that of B
C. A is less than that of B
D. A is twice the pressure of B
7 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
8 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
9 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
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
10 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880

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