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

Which of the following is not an example of adiabatic process

Question # 2

If the formula PV = nRT, n denotes:

Question # 3

The motion of molecules in gases is:

Question # 4

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 # 5

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

Question # 6

A heat engine is that which converts

Question # 7

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

Question # 8

Which of the following is a state variable

Question # 9

The product of the pressure and volume of an ideal gas is

Question # 10

The pressure exerted by the gas is

Question # 11

Adiabatic change occurs when the gas

Question # 12

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

Question # 13

At constant volume temperature is increased. Then

Question # 14

Efficiency of carnot engine is independent of the

Question # 15

For the working of a heat engine, there must be

Question # 16

The bicycle pump provides a good example of

Question # 17

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 18

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 19

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

Question # 20

Absolute temperature can be calculated by

Question # 21

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 22

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

Question # 23

The ideal gas law is

Question # 24

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

Question # 25

A diatomic gas molecule has

Question # 26

In the formula P = N0KT, N0denotes:

Question # 27

No spark plug is needed in

Question # 28

Internal energy is the sum of all the forms of

Question # 29

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
2 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
3 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
4 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
5 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
6 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
7 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
8 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
9 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
10 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them

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