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 value of E0in coulomb's law is:

Question # 2

Rice takes longest to cook

Question # 3

If the formula PV = nRT, n denotes:

Question # 4

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

Question # 5

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

Question # 6

One kilogram of different substances contain

Question # 7

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

Question # 8

If an amount of heat enters the system it could

Question # 9

First law of thermodynamic is special case of

Question # 10

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

Question # 11

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 12

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

Question # 13

In an adiabatic expansion, the temperature of the gas

Question # 14

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

Question # 15

Which quantity is important in stating the entropy of the system

Question # 16

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

Question # 17

Real gases strictly obey gas law at:

Question # 18

The curve representing an adiabatic process is called

Question # 19

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

Question # 20

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

Question # 21

The only significant motion possessed by the mono-atomic gas represented is:

Question # 22

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

Question # 23

At absolute temperature, the kinetic energy of the molecules

Question # 24

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 # 25

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 26

During the whole carnot cycle

Question # 27

The bicycle pump provides a good example of

Question # 28

The temperature scale approved in SI units is:

Question # 29

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

Question # 30

When two objects are rubbed together, their internal energy

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
2 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
3 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
4 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
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 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
7 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
8 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
9 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
10 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them

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