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 heat engine is that which converts

Question # 2

The volume of universal gas constant R is:

Question # 3

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

Question # 4

The internal energy of an ideal gas system is generally the

Question # 5

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 6

One mole of any substance contain

Question # 7

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

Question # 8

The absolute temperature of the tripple point of water is

Question # 9

If an amount of heat enters the system it could

Question # 10

The temperature of gas is produced by

Question # 11

For the working of a heat engine, there must be

Question # 12

Pressure of a gas at constant volume is proportion to

Question # 13

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

Question # 14

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 # 15

A real gas can be approximated to an ideal gas at

Question # 16

The motion of molecules in gases is:

Question # 17

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

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 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 # 20

The pressure exerted by the gas is

Question # 21

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

Question # 22

The bicycle pump provides a good example of

Question # 23

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 24

The Boltzman constant has the value

Question # 25

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

Question # 26

A process is a reversible process, if the entropy of the system

Question # 27

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

Question # 28

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

Question # 29

When two objects are rubbed together, their internal energy

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
2
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
3 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
4 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
5 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
6 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
7 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
D. None of these
8 Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure
A. A greater than than of B
B. A is equal to that of B
C. A is less than that of B
D. A is twice the pressure of B
9 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them
10 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them

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