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

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 2

The only significant motion possessed by the mono-atomic gas represented is:

Question # 3

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

Question # 4

The bicycle pump provides a good example of

Question # 5

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

Question # 6

The pressure exerted by the gas is

Question # 7

Which of the following is not an assumption of kinetic energy

Question # 8

The curve representing an isothermal process is called

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

A reversible cycle is the one in which

Question # 13

A heat engine is that which converts

Question # 14

First law of thermodynamics is consequence of conservation of

Question # 15

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 16

First law of thermodynamic is special case of

Question # 17

Efficiency of carnot engine is independent of the

Question # 18

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

Question # 19

An isochoric process is one which take place at

Question # 20

The absolute temperature of the tripple point of water is

Question # 21

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

Question # 22

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

Question # 23

A diatomic gas molecule has

Question # 24

The state in which ice, water and vapour coexists in equilibrium is called

Question # 25

Absolute zero is considered as that temperature at which:

Question # 26

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 # 27

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

Question # 28

Adiabatic change occurs when the gas

Question # 29

When two objects are rubbed together, their internal energy

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:
A. N = nNAm = MNA
B. n = N NA, M = mNA
C. M = NA/N , NA= m/n
D. N = nNA, M = mNA
3 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
4 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
5 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
6 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
7 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
8 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
9 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
10 The ideal gas law is
A. P = nRT
B. V = nRT
C. PV =RT
D. PV =nRT

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