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 second law of thermodynamics is concerned with the circumstances in which

Question # 2

Which quantity is important in stating the entropy of the system

Question # 3

Maximum density of H2O is at the temperature

Question # 4

The value of E0in coulomb's law is:

Question # 5

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

Question # 6

Internal energy is the sum of all the forms of

Question # 7

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 8

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

Question # 9

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 10

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 11

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

Question # 12

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 13

A diatomic gas molecule has

Question # 14

In the study of thermodynamics, which gas is considered as the working substance

Question # 15

The curve representing an isothermal process is called

Question # 16

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

Question # 17

Adiabatic change occurs when the gas

Question # 18

First law of thermodynamic is special case of

Question # 19

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

Question # 20

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 21

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 22

The internal energy of a system does not depend upon the

Question # 23

A heat engine is that which converts

Question # 24

Good absorbers of heat are

Question # 25

An isochoric process is one which take place at

Question # 26

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

Question # 27

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

Question # 28

The motion of molecules in gases is:

Question # 29

Pressure exerted by a gas is

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
3 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
4 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
5 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
6 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
7 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
8 If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then
A. Cp- Cv= R
B. Cp- Cv < R
C. Cp- Cv = 0
D. Cp- Cv > R
9 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
10 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B

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