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

If an amount of heat enters the system it could

Question # 2

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 3

The volume of universal gas constant R is:

Question # 4

The curve representing an isothermal process is called

Question # 5

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 # 6

Triple point of water is

Question # 7

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

Question # 8

A diatomic gas molecule has

Question # 9

In an ideal gas, the molecules have:

Question # 10

According to kinetic theory of gases, molecules of a gas behave like

Question # 11

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

Question # 12

Efficiency of carnot engine is independent of the

Question # 13

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 14

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 15

Internal energy is the sum of all the forms of

Question # 16

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

Question # 17

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

Question # 18

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 # 19

In a heat engine, heat is supplied by the

Question # 20

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

Question # 21

Which of the following is not thermo dynamical function?

Question # 22

A real gas can be approximated to an ideal gas at

Question # 23

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

Question # 24

Pressure may be define as _______ per second per unit area:

Question # 25

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

Question # 26

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 27

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 28

If the volume of the gas is to be increased by 4 times, then

Question # 29

An isochoric process is one which take place at

Question # 30

Which of the following does not have the same units:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
2 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
3 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
4 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
5 According to the second law, which is must to produce work
A. a source contains a large amount of heat energy
B. two sources at the same temperature
C. two sources at the different temperatures
D. a source contains a small amount of energy
6 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
7 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
8 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
9 A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:
A. Ideal gas
B. Inert gas
C. Real gas
D. None of these
10 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

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