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

The rate of change of momentum of a molecule is equal to:

Question # 2

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

Question # 3

For the working of a heat engine, there must be

Question # 4

When two objects are rubbed together, their internal energy

Question # 5

No spark plug is needed in

Question # 6

In a heat engine, heat is supplied by the

Question # 7

Absolute temperature can be calculated by

Question # 8

The number of translation degress of freedom for a diatomic gas is

Question # 9

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 10

The Boltzman constant has the value

Question # 11

If the formula PV = nRT, n denotes:

Question # 12

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

Question # 13

Pressure exerted by a gas is

Question # 14

When heat is removed from the system

Question # 15

Adiabatic change occurs when the gas

Question # 16

A succession of events which bring the system back to its initial condition is called

Question # 17

Which quantity is important in stating the entropy of the system

Question # 18

We can express the work in term of

Question # 19

While deriving the equation for pressure of a gas we consider the

Question # 20

The relationship between Boltzmann constant k with R and NAis given as:

Question # 21

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 22

Brownian motion increases due to

Question # 23

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 24

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 25

A reversible cycle is the one in which

Question # 26

Which of the following is a state variable

Question # 27

In thermodynamics, internal energy is the function of

Question # 28

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

Question # 29

Carnot heat engine only used

Question # 30

Generally a temperature scale is established by

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
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 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
4 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
5 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
6 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
7 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
8 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
9 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
10 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these

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