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

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

Question # 2

The absolute temperature of the tripple point of water is

Question # 3

The process which is carried out at constant temperature is known as

Question # 4

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

Question # 5

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

Question # 6

A process in which no heat enters or leaves the system is called

Question # 7

The example of irreversible process is

Question # 8

First law of thermodynamics is consequence of conservation of

Question # 9

During the whole carnot cycle

Question # 10

The curve representing an isothermal process is called

Question # 11

Absolute temperature can be calculated by

Question # 12

Energy gas behaves like an ideal gast at

Question # 13

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

Question # 14

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

Question # 15

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 16

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

Question # 17

In thermodynamics, internal energy is the function of

Question # 18

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

Question # 19

The value of E0in coulomb's law is:

Question # 20

Internal energy is the sum of all the forms of

Question # 21

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

Question # 22

In the formula P = N0KT, N0denotes:

Question # 23

The absolute temperature for an ideal gas is

Question # 24

The unit of thermodynamical scale is

Question # 25

The ideal gas law is

Question # 26

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

Question # 27

One kilogram of different substances contain

Question # 28

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

Question # 29

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
2 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
3 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
4 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
5 First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about
A. how heat is absorbed
B. how heat extracted
C. how this conversion takes place
D. none of them
6 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
7 Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
8 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
9 Which of the following is not an example of adiabatic process
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them
10 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None

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