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

When heat is removed from the system

Question # 2

The volume of universal gas constant R is:

Question # 3

Heat travels through vacuum by

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 8

Internal energy is the sum of all the forms of

Question # 9

In an adiabatic process the work is done at the expense of the

Question # 10

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

Question # 11

If the formula PV = nRT, n denotes:

Question # 12

When two objects are rubbed together, their internal energy

Question # 13

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

Question # 14

The example of irreversible process is

Question # 15

When two objects come to common temperature, the body is said to be in:

Question # 16

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

Question # 17

Good absorbers of heat are

Question # 18

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

Question # 19

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 20

In the study of thermodynamics, which gas is considered as the working substance

Question # 21

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

Question # 22

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 # 23

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

Question # 24

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 25

A heat engine is that which converts

Question # 26

Adiabatic change occurs when the gas

Question # 27

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 # 28

The motion of molecules in gases is:

Question # 29

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 30

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
2 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
3 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
4 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
5 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
6 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
7 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
8 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
9 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
10 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these

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