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

Melting point of ice

Question # 3

When two objects are rubbed together, their internal energy

Question # 4

The relationship between Boltzmann constant k with R and NAis given as:

Question # 5

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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 # 10

The nature of thermal radiation is similar to:

Question # 11

The second law of thermodynamics is concerned with the circumstances in which

Question # 12

For the working of a heat engine, there must be

Question # 13

Sadi carnot described an ideal heat engine in

Question # 14

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

Question # 15

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

Question # 16

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 17

Hotness and coldness of an object is represented in terms:

Question # 18

First law of thermodynamic is special case of

Question # 19

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 20

No spark plug is needed in

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Rice takes longest to cook

Question # 25

When two objects come to common temperature, the body is said to be in:

Question # 26

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

Question # 27

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

Question # 28

A succession of events which bring the system back to its initial condition is called

Question # 29

A process in which no heat enters or leaves the system is called

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
3 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them
4 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
5 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
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 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
8 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
9 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
10 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K

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