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

If the formula PV = nRT, n denotes:

Question # 2

The temperature scale approved in SI units is:

Question # 3

The curve representing an adiabatic process is called

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Truth of kinetic energy is confirmed by:

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

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

Question # 10

The efficiency of diesel engine is

Question # 11

In an ideal gas, the molecules have:

Question # 12

Absolute temperature can be calculated by

Question # 13

Absolute zero is considered as that temperature at which:

Question # 14

The pressure exerted by the gas is

Question # 15

Boyle's law is applicable in

Question # 16

A carnot cycle consists of

Question # 17

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

Question # 18

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 # 19

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

Question # 20

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 21

At absolute temperature, the kinetic energy of the molecules

Question # 22

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 23

The absolute temperature of the tripple point of water is

Question # 24

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

Question # 25

One mole of any substance contain

Question # 26

At constant volume temperature is increased. Then

Question # 27

The ideal gas law is

Question # 28

Carnot heat engine only used

Question # 29

The concept of entropy was introduced into the study of thermodynamics in

Question # 30

Internal energy is the sum of all the forms of

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
2 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
3 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
4 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
5 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
6 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
7 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
8 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
9 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
10 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

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