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 motion of molecules in gases is:

Question # 2

Maximum density of H2O is at the temperature

Question # 3

Internal energy is the sum of all the forms of

Question # 4

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 5

For the working of a heat engine, there must be

Question # 6

An isochoric process is one which take place at

Question # 7

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

Question # 8

In thermodynamics, internal energy is the function of

Question # 9

The pressure exerted by the gas is

Question # 10

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

Question # 11

Rice takes longest to cook

Question # 12

In an ideal gas, the molecules have:

Question # 13

Absolute temperature can be calculated by

Question # 14

The value of E0in coulomb's law is:

Question # 15

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

Question # 16

At absolute temperature, the kinetic energy of the molecules

Question # 17

A diatomic gas molecule has

Question # 18

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

Question # 19

The ideal gas law is

Question # 20

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

Question # 21

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

Question # 22

The concept of entropy was introduced into the study of thermodynamics in

Question # 23

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 24

Hotness and coldness of an object is represented in terms:

Question # 25

In an adiabatic expansion, the temperature of the gas

Question # 26

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

Question # 27

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 28

The volume of universal gas constant R is:

Question # 29

Pressure exerted by a gas is

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
3 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
4 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
5 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
6 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
7 If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy
A. 0 J
B. 2 J
C. 5 J
D. 10 J
8 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
9 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
10 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?
A. Each have same number of molecules
B. Don't have same number of molecules
C. Can't be predicted
D. None

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