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

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

Question # 2

Which of the following does not have the same units:

Question # 3

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 4

At constant volume temperature is increased. Then

Question # 5

The bicycle pump provides a good example of

Question # 6

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 # 7

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

Question # 8

The process which is carried out at constant temperature is known as

Question # 9

An isochoric process is one which take place at

Question # 10

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 11

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 # 12

At absolute temperature, the kinetic energy of the molecules

Question # 13

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

Question # 14

The motion of molecules in gases is:

Question # 15

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

Question # 16

The example of reversible process is

Question # 17

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 18

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

Question # 19

The absolute temperature of the tripple point of water is

Question # 20

The ideal gas law is

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

The value of E0in coulomb's law is:

Question # 25

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 26

If the formula PV = nRT, n denotes:

Question # 27

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

Question # 28

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 29

Which of the following is not thermo dynamical function?

Question # 30

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

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Sr.# Question Answer
1 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
2 The product of the pressure and volume of an ideal gas is
A. A constant
B. Approximately equal to the universal gas constant
C. Directly proportional to its temperature
D. Inversely proportional to its temperature
3 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
4 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
5 The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to
A. 0°C
B. 10°C
C. 17°C
D. 20°C
6 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
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 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
9 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
10 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these

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