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

A carnot cycle consists of

Question # 2

The nature of thermal radiation is similar to:

Question # 3

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

Question # 4

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 5

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

Question # 6

Brownian motion increases due to

Question # 7

The bicycle pump provides a good example of

Question # 8

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

Question # 9

Generally a temperature scale is established by

Question # 10

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

Question # 11

In case of an ideal gas, the P.E associated with its molecule is

Question # 12

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

Question # 13

In all natural processes where heat flows from one system to another, there is always a net

Question # 14

If an amount of heat enters the system it could

Question # 15

Absolute temperature can be calculated by

Question # 16

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

Question # 17

In an adiabatic process the work is done at the expense of the

Question # 18

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

Question # 19

The example of irreversible process is

Question # 20

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

Question # 21

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 # 22

The temperature of gas is produced by

Question # 23

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

Question # 24

If the distance between two charges is doubled, the force between them will become:

Question # 25

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

Question # 26

Which of the following does not have the same units:

Question # 27

We cannot utilize the heat contents of oceans and atmosphere because

Question # 28

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

Question # 29

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 30

The absolute temperature of the tripple point of water is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The volume of universal gas constant R is:
A. 8.314 J/K mole K
B. 8314 J/K mole K
C. 8.314 J/mole K
D. None of these
2 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
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 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
5 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
6 A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called
A. reversible process
B. irreversible process
C. any one of them
D. none of them
7 While deriving equation of pressure by kinetic theory of gases, we take into account:
A. Only linear motion of molecules
B. Only rotational motion
C. Only vibratory motion
D. All of these
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 The basis to define a temperature scale that is independent of material properties is provided by
A. carbon cycle
B. nitrogen cycle
C. Carnot cycle
D. irreversible cycle
10 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure

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