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 Boltzman constant has the value

Question # 2

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

Question # 3

If the formula PV = nRT, n denotes:

Question # 4

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

Question # 5

A process is a reversible process, if the entropy of the system

Question # 6

A real gas can be approximated to an ideal gas at

Question # 7

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 8

One kilogram of different substances contain

Question # 9

We can express the work in term of

Question # 10

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 11

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 12

Sadi carnot described an ideal heat engine in

Question # 13

Brownian motion increases due to

Question # 14

First law of thermodynamic is special case of

Question # 15

The absolute temperature of the tripple point of water is

Question # 16

The curve representing an adiabatic process is called

Question # 17

Pressure of a gas at constant volume is proportion to

Question # 18

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 # 19

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

Question # 20

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

Question # 21

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

Question # 22

Heat travels through vacuum by

Question # 23

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

Question # 24

At absolute temperature, the kinetic energy of the molecules

Question # 25

Which of the following is not thermo dynamical function?

Question # 26

The basis to define a temperature scale that is independent of material properties is provided by

Question # 27

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 # 28

Efficiency of carnot engine is independent of the

Question # 29

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 30

The internal energy of a system does not depend upon the

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
2 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
3 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
4 The process which is carried out at constant temperature is known as
A. adiabatic process
B. isothermal process
C. isochoric process
D. none of them
5 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
6 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
A. 300°C
B. 573°C
C. 600°C
D. 743°C
7 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
8 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
9 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
10 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

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