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

When heat is removed from the system

Question # 2

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

Question # 3

Which of the following does not have the same units:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 8

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 9

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

Question # 10

If the formula PV = nRT, n denotes:

Question # 11

The nature of thermal radiation is similar to:

Question # 12

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

Question # 13

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 14

The internal energy of an ideal gas system is generally the

Question # 15

The bicycle pump provides a good example of

Question # 16

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 17

Which quantity is important in stating the entropy of the system

Question # 18

During the whole carnot cycle

Question # 19

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

Question # 20

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 21

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

Question # 22

The basis to define a temperature scale that is independent of material properties is provided by

Question # 23

One mole of any substance contain

Question # 24

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

Question # 25

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 26

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

Question # 27

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

Question # 28

A diatomic gas molecule has

Question # 29

If an amount of heat enters the system it could

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 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
2 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
3 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
4 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
5 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
6 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
7 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
8 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
9 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
10 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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