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 curve representing an isothermal process is called

Question # 2

Carnot heat engine only used

Question # 3

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

Question # 4

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

Question # 5

A heat engine is that which converts

Question # 6

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 # 7

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

Question # 8

The process which is carried out at constant temperature is known as

Question # 9

First law of thermodynamic is special case of

Question # 10

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 11

Internal energy is the sum of all the forms of

Question # 12

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

Question # 13

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

Question # 14

Rice takes longest to cook

Question # 15

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

Question # 16

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 # 17

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

Question # 18

One kilogram of different substances contain

Question # 19

Absolute zero is considered as that temperature at which:

Question # 20

The absolute temperature for an ideal gas is

Question # 21

According to kinetic theory of gases, molecules of a gas behave like

Question # 22

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

Question # 23

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

Question # 24

At O° K which of the following properties of a gas will be zero?

Question # 25

The bicycle pump provides a good example of

Question # 26

A reversible cycle is the one in which

Question # 27

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 28

The curve representing an adiabatic process is called

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
2 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
3 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
4 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
5 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
6 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
7 The Boltzman constant has the value
A. 1.38 x 10-23JK-1
B. 1.28 x 10-23JK-1
C. 1.38 x 10-26JK-1
D. 1.28 x 10-26JK-1
8 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
9 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
10 The behaviour of gases is well accounted by the kinetic theory based on
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them

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