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

We cannot utilize the heat contents of oceans and atmosphere because

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 pressure exerted by the gas is

Question # 4

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

Question # 5

The second law of thermodynamics is concerned with the circumstances in which

Question # 6

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

Question # 7

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

Question # 8

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 9

The absolute temperature of the tripple point of water is

Question # 10

The absolute temperature for an ideal gas is

Question # 11

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 12

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 13

We can express the work in term of

Question # 14

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

Question # 15

In the theory of dimensional analysis, heat may be properly represented by:

Question # 16

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

Question # 17

The example of irreversible process is

Question # 18

The curve representing an isothermal process is called

Question # 19

When heat is removed from the system

Question # 20

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

Question # 21

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 22

The work done on the system by the environment is considered as

Question # 23

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

Question # 24

Which of the following is not an assumption of kinetic energy

Question # 25

Energy gas behaves like an ideal gast at

Question # 26

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 27

Which of the following is not thermo dynamical function?

Question # 28

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 29

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

Question # 30

First law of thermodynamic is special case of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
3 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
4 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
5 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
6 Hotness and coldness of an object is represented in terms:
A. Heat
B. Temperature
C. Chemical energy
D. None of these
7 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
8 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
9 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
10 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density

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