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

One mole of any substance contain

Question # 2

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

Question # 3

Absolute temperature can be calculated by

Question # 4

An isochoric process is one which take place at

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Truth of kinetic energy is confirmed by:

Question # 9

Electromagnetic waves emitted by hot bodies are called:

Question # 10

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 11

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 12

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

Question # 13

The product of the pressure and volume of an ideal gas is

Question # 14

The curve representing an isothermal process is called

Question # 15

When two objects come to common temperature, the body is said to be in:

Question # 16

The pressure exerted by the gas is

Question # 17

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

Question # 18

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

Question # 19

The ideal gas law is

Question # 20

Rice takes longest to cook

Question # 21

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

Question # 22

The disorder in the system increases due to the

Question # 23

A process in which no heat enters or leaves the system is called

Question # 24

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

Question # 25

One kilogram of different substances contain

Question # 26

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

Question # 27

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 28

Triple point of water is

Question # 29

Gas constant per molecule is called:

Question # 30

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

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Sr.# Question Answer
1 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
2 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
3 If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then
A. Cp- Cv= R
B. Cp- Cv < R
C. Cp- Cv = 0
D. Cp- Cv > R
4 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
5 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
6 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
7 The internal energy of an ideal gas system is generally the
A. translational K.E of molecules
B. vibrational K.E of molecules
C. rotational K.E of molecules
D. all of them
8 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
9 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
10 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
11 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
12 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
13 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
14 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
15 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
16 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
17 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
18 The pressure exerted by the gas is
A. directly proportional to the P.E
B. inversely proportional to the P.E
C. inversely proportional to the K.E
D. directly proportional to the K.E
19 On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed
A. adiabatically
B. isothermally
C. isochorcally
D. isobarically
20 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
21 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
22 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps
23 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
24 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
25 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
A. 300°C
B. 573°C
C. 600°C
D. 743°C
26 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
27 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
28 When heat is added into the system then change in entropy is
A. negative
B. positive
C. zero
D. any one of them
29 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
30 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them

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