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 bicycle pump provides a good example of

Question # 2

The earliest heat engine was

Question # 3

In the formula P = N0KT, N0denotes:

Question # 4

Adiabatic change occurs when the gas

Question # 5

The curve representing an isothermal process is called

Question # 6

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

Question # 7

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 8

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

Question # 9

The disorder in the system increases due to the

Question # 10

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 11

Energy gas behaves like an ideal gast at

Question # 12

The process which is carried out at constant temperature is known as

Question # 13

The number of translation degress of freedom for a diatomic gas is

Question # 14

Absolute zero is considered as that temperature at which:

Question # 15

The motion of molecules in gases is:

Question # 16

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

Question # 17

Real gases strictly obey gas law at:

Question # 18

Boyle's law is applicable in

Question # 19

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

Question # 20

We can express the work in term of

Question # 21

Brownian motion increases due to

Question # 22

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

Question # 23

The work done on the system by the environment is considered as

Question # 24

No spark plug is needed in

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

While deriving the equation for pressure of a gas we consider the

Question # 29

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

Question # 30

Sadi carnot described an ideal heat engine in

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
2 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
3 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
4 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
5 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
6 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
7 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
8 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
9 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
10 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these

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