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

According to kinetic theory of gases, molecules of a gas behave like

Question # 2

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

Question # 3

At O° K which of the following properties of a gas will be zero?

Question # 4

First law of thermodynamics is consequence of conservation of

Question # 5

The bicycle pump provides a good example of

Question # 6

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 7

Which of the following is not an assumption of kinetic energy

Question # 8

When heat is removed from the system

Question # 9

Pressure exerted by a gas is

Question # 10

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 11

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

Question # 12

The earliest heat engine was

Question # 13

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

Question # 14

Boyle's law is applicable in

Question # 15

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 16

The efficiency of diesel engine is

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 22

The Boltzman constant has the value

Question # 23

One mole of any substance contain

Question # 24

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 # 25

Which quantity is important in stating the entropy of the system

Question # 26

One kilogram of different substances contain

Question # 27

Melting point of ice

Question # 28

When two objects are rubbed together, their internal energy

Question # 29

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 30

The disorder in the system increases due to the

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
2 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
3 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
4 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
5 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
6 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
7 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
8 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
9 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
10 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

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