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

If an amount of heat enters the system it could

Question # 2

Truth of kinetic energy is confirmed by:

Question # 3

Energy gas behaves like an ideal gast at

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Which of the following is not an assumption of kinetic energy

Question # 8

The value of E0in coulomb's law is:

Question # 9

Which of the following is not an example of adiabatic process

Question # 10

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

Question # 11

The absolute temperature for an ideal gas is

Question # 12

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

Question # 13

First law of thermodynamics is consequence of conservation of

Question # 14

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 15

Hotness and coldness of an object is represented in terms:

Question # 16

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

Question # 17

One mole of any substance contain

Question # 18

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

Question # 19

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 20

When heat is removed from the system

Question # 21

One kilogram of different substances contain

Question # 22

Real gases strictly obey gas law at:

Question # 23

Heat travels through vacuum by

Question # 24

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 25

Generally a temperature scale is established by

Question # 26

Electromagnetic waves emitted by hot bodies are called:

Question # 27

First law of thermodynamic is special case of

Question # 28

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 29

The bicycle pump provides a good example of

Question # 30

In the formula P = N0KT, N0denotes:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
2 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
3 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
4 If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy
A. 0 J
B. 2 J
C. 5 J
D. 10 J
5 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
6 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
7 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
8 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
9 If water in a closed bottle is taken up to the moon and opened, the water gets
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
10 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these

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