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

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

Question # 2

Which of the following is not an assumption of kinetic energy

Question # 3

The value of E0in coulomb's law is:

Question # 4

The number of translation degress of freedom for a diatomic gas is

Question # 5

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

Question # 6

Efficiency of carnot engine is independent of the

Question # 7

If the formula PV = nRT, n denotes:

Question # 8

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

Question # 9

The curve representing an isothermal process is called

Question # 10

No spark plug is needed in

Question # 11

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

Question # 12

A diatomic gas molecule has

Question # 13

The disorder in the system increases due to the

Question # 14

In a heat engine, heat is supplied by the

Question # 15

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

Question # 16

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 17

First law of thermodynamics is consequence of conservation of

Question # 18

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

Question # 19

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

Question # 20

The internal energy of an ideal gas system is generally the

Question # 21

An isochoric process is one which take place at

Question # 22

The curve representing an adiabatic process is called

Question # 23

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

Question # 24

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

Question # 25

In an ideal gas, the molecules have:

Question # 26

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

Question # 27

In the theory of dimensional analysis, heat may be properly represented by:

Question # 28

If an amount of heat enters the system it could

Question # 29

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

Question # 30

Rice takes longest to cook

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
2 One kilogram of different substances contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
3 If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>
4 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
5 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
6 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
7 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
8 Specific heat at constant pressure is greater than the specific heat at constant volume because
A. Heat is used up to increase temperature at constant pressure
B. Heat is used by gas for expansions purposes at constant pressure
C. Heat is use dup to increase internal energy
D. The above statement is invalid
9 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature
10 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them

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