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

During the whole carnot cycle

Question # 2

The product of the pressure and volume of an ideal gas is

Question # 3

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

Question # 4

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

Question # 5

The absolute temperature of the tripple point of water is

Question # 6

The volume of universal gas constant R is:

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

The example of reversible process is

Question # 9

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

Question # 10

Which quantity is important in stating the entropy of the system

Question # 11

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 12

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

Question # 13

The motion of molecules in gases is:

Question # 14

Absolute zero is considered as that temperature at which:

Question # 15

Brownian motion increases due to

Question # 16

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

Question # 17

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 18

In all natural processes where heat flows from one system to another, there is always a net

Question # 19

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

Question # 20

Which of the following is a state variable

Question # 21

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 22

Average KE of a gas molecule has:

Question # 23

Absolute temperature can be calculated by

Question # 24

Which of the following is not an example of adiabatic process

Question # 25

One kilogram of different substances contain

Question # 26

If the distance between two charges is doubled, the force between them will become:

Question # 27

The pressure exerted by the gas is

Question # 28

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

Question # 29

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 30

The Boltzman constant has the value

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
2 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
3 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
4 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
5 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
6 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
7 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
8 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
9 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
10 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them

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