ECAT Pre Computer Science Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

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ECAT Physics Chapter 11 Heat & Thermodynamics

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Question # 1

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

Question # 2

Maximum density of H2O is at the temperature

Question # 3

The ideal gas law is

Question # 4

Pressure of a gas at constant volume is proportion to

Question # 5

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

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

The unit of thermodynamical scale is

Question # 8

The earliest heat engine was

Question # 9

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 10

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

Question # 11

If the distance between two charges is doubled, the force between them will become:

Question # 12

One kilogram of different substances contain

Question # 13

Hotness and coldness of an object is represented in terms:

Question # 14

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 15

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

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ECAT Class Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
2 The basis to define a temperature scale that is independent of material properties is provided by
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle
3 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
4 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
5
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
6 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
7 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
8 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
9 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
10 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity

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