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

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

Question # 2

Pressure of a gas at constant volume is proportion to

Question # 3

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

Question # 4

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

Question # 5

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 6

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

Question # 7

For the working of a heat engine, there must be

Question # 8

Pressure exerted by a gas is

Question # 9

The internal energy of an ideal gas system is generally the

Question # 10

Which of the following is not thermo dynamical function?

Question # 11

Which of the following is not an assumption of kinetic energy

Question # 12

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

Question # 13

The pressure exerted by the gas is

Question # 14

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 15

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

Question # 16

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

Question # 17

The example of reversible process is

Question # 18

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

Question # 19

The temperature of gas is produced by

Question # 20

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

Question # 21

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 22

A diatomic gas molecule has

Question # 23

The bicycle pump provides a good example of

Question # 24

At constant volume temperature is increased. Then

Question # 25

Internal energy is the sum of all the forms of

Question # 26

Energy gas behaves like an ideal gast at

Question # 27

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

Question # 28

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 # 29

The example of irreversible process is

Question # 30

The motion of molecules in gases is:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
2 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
3 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
4 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
5 A typical four stroke petrol engine undergoes how many successive processes in each cycle
A. one
B. two
C. three
D. four
6 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
7 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
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 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
10 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them

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