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

Question # 2

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

Question # 3

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

Question # 4

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 5

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

Question # 6

The internal energy of an ideal gas system is generally the

Question # 7

For the working of a heat engine, there must be

Question # 8

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

Question # 9

One kilogram of different substances contain

Question # 10

According to the second law, which is must to produce work

Question # 11

The absolute temperature for an ideal gas is

Question # 12

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

Question # 13

The Boltzman constant has the value

Question # 14

The absolute temperature of the tripple point of water is

Question # 15

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

Question # 16

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 # 17

If the formula PV = nRT, n denotes:

Question # 18

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

Question # 19

The example of reversible process is

Question # 20

An isochoric process is one which take place at

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Generally a temperature scale is established by

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Energy gas behaves like an ideal gast at

Question # 30

No spark plug is needed in

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then
A. Cp- Cv= R
B. Cp- Cv < R
C. Cp- Cv = 0
D. Cp- Cv > R
3 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
4 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT
5 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
6 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
7 It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
8 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
9 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
10 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

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