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

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

Question # 2

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 3

The behaviour of gases is well accounted by the kinetic theory based on

Question # 4

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

Question # 5

When two objects are rubbed together, their internal energy

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

The temperature scale approved in SI units is:

Question # 10

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

Question # 11

During the whole carnot cycle

Question # 12

Boyle's law is applicable in

Question # 13

A real gas can be approximated to an ideal gas at

Question # 14

A heat engine is that which converts

Question # 15

Rice takes longest to cook

Question # 16

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

Question # 17

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 18

We cannot utilize the heat contents of oceans and atmosphere because

Question # 19

If the formula PV = nRT, n denotes:

Question # 20

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

Question # 21

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 # 22

Maximum density of H2O is at the temperature

Question # 23

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 24

The example of reversible process is

Question # 25

The efficiency of diesel engine is

Question # 26

The state in which ice, water and vapour coexists in equilibrium is called

Question # 27

Which of the following is a state variable

Question # 28

The unit of thermodynamical scale is

Question # 29

Which quantity is important in stating the entropy of the system

Question # 30

Absolute zero is considered as that temperature at which:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve
2 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
3 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
4 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
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
5 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
6 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
7 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
8 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
9 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
10 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power

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