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

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 2

Carnot heat engine only used

Question # 3

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

Question # 4

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 5

The efficiency of diesel engine is

Question # 6

In all natural processes where heat flows from one system to another, there is always a net

Question # 7

A carnot cycle consists of

Question # 8

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

Question # 9

Which of the following is a state variable

Question # 10

Which of the following is not thermo dynamical function?

Question # 11

Gas constant per molecule is called:

Question # 12

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

Question # 13

The motion of molecules in gases is:

Question # 14

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 # 15

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

Question # 16

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

Question # 17

The internal energy of an ideal gas system is generally the

Question # 18

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

Question # 19

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 20

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

Question # 21

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 22

Sadi carnot described an ideal heat engine in

Question # 23

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 24

A real gas can be approximated to an ideal gas at

Question # 25

Boyle's law is applicable in

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 30

Good absorbers of heat are

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The number of translation degress of freedom for a diatomic gas is
A. 2
B. 3
C. 5
D. 6
2 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
3 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
4 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
5 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
6 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
7 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
8 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
9 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
10 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these

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