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

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 # 2

Gas constant per molecule is called:

Question # 3

Which of the following is not an assumption of kinetic energy

Question # 4

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

Question # 5

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

Question # 6

We can express the work in term of

Question # 7

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 8

A carnot cycle consists of

Question # 9

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

Question # 10

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

Question # 11

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 12

In an adiabatic process the work is done at the expense of the

Question # 13

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

Question # 14

Maximum density of H2O is at the temperature

Question # 15

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 16

The rate of change of momentum of a molecule is equal to:

Question # 17

The earliest heat engine was

Question # 18

Rice takes longest to cook

Question # 19

According to the second law, which is must to produce work

Question # 20

Which of the following does not have the same units:

Question # 21

The volume of universal gas constant R is:

Question # 22

Internal energy is the sum of all the forms of

Question # 23

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

Question # 24

In the formula P = N0KT, N0denotes:

Question # 25

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

Question # 26

The efficiency of diesel engine is

Question # 27

On colliding in a closed container, the gas molecules

Question # 28

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

Question # 29

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 30

While deriving equation of pressure by kinetic theory of gases, we take into account:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
2 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
3 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
4 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
5 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
6 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
7 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
8 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
9 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
10 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

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