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

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

Question # 2

Generally a temperature scale is established by

Question # 3

The earliest heat engine was

Question # 4

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 # 5

Carnot heat engine only used

Question # 6

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

Question # 7

The value of E0in coulomb's law is:

Question # 8

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 9

Internal energy is the sum of all the forms of

Question # 10

When heat is removed from the system

Question # 11

The second law of thermodynamics is concerned with the circumstances in which

Question # 12

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

Question # 13

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 14

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

Question # 15

Energy gas behaves like an ideal gast at

Question # 16

Maximum density of H2O is at the temperature

Question # 17

The nature of thermal radiation is similar to:

Question # 18

When heat is added into the system then change in entropy is

Question # 19

A carnot cycle consists of

Question # 20

A succession of events which bring the system back to its initial condition is called

Question # 21

The disorder in the system increases due to the

Question # 22

In the formula P = N0KT, N0denotes:

Question # 23

The absolute temperature for an ideal gas is

Question # 24

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

Question # 25

In the study of thermodynamics, which gas is considered as the working substance

Question # 26

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

Question # 27

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

Question # 28

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 29

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

Question # 30

The unit of thermodynamical scale is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
2 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres
3 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
4 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
5 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
6 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
7 On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands
A. adiabatically
B. isothermally
C. isochorically
D. isobarically
8 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
9 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
10 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas

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