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

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

Question # 2

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

Question # 3

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

Question # 4

Generally a temperature scale is established by

Question # 5

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

Question # 6

The earliest heat engine was

Question # 7

When two objects are rubbed together, their internal energy

Question # 8

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 9

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 # 10

One kilogram of different substances contain

Question # 11

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

Question # 12

A real gas can be approximated to an ideal gas at

Question # 13

If an amount of heat enters the system it could

Question # 14

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 15

For the working of a heat engine, there must be

Question # 16

The state in which ice, water and vapour coexists in equilibrium is called

Question # 17

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

Question # 18

The curve representing an isothermal process is called

Question # 19

The bicycle pump provides a good example of

Question # 20

A diatomic gas molecule has

Question # 21

Efficiency of carnot engine is independent of the

Question # 22

Boyle's law is applicable in

Question # 23

The internal energy of a system does not depend upon the

Question # 24

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

Question # 25

Gas constant per molecule is called:

Question # 26

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 # 27

The Boltzman constant has the value

Question # 28

Rice takes longest to cook

Question # 29

When heat is added into the system then change in entropy is

Question # 30

In the reverse process, the working substance passes through the same stages as in the direct process and

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
2 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
3 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
4 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
5 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
6 If an amount of heat enters the system it could
A. decrease the internal energy
B. not change the internal energy
C. increase the internal energy
D. none of them
7 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
8 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
9 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
10 If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:
A. Force
B. Density
C. Work done
D. Pressure

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