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 thermodynamics, internal energy is the function of

Question # 2

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 # 3

When heat is removed from the system

Question # 4

Efficiency of carnot engine is independent of the

Question # 5

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 6

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

Question # 7

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

Question # 8

When two objects are rubbed together, their internal energy

Question # 9

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

Question # 10

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

Question # 11

Absolute temperature can be calculated by

Question # 12

The temperature scale approved in SI units is:

Question # 13

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 14

In an ideal gas, the molecules have:

Question # 15

First law of thermodynamic is special case of

Question # 16

Pressure of a gas at constant volume is proportion to

Question # 17

The motion of molecules in gases is:

Question # 18

Carnot heat engine only used

Question # 19

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

Question # 20

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

Question # 21

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 22

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

Question # 23

The internal energy of a system does not depend upon the

Question # 24

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

Question # 25

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

Question # 26

Average KE of a gas molecule has:

Question # 27

The curve representing an isothermal process is called

Question # 28

In the formula P = N0KT, N0denotes:

Question # 29

The rate of change of momentum of a molecule is equal to:

Question # 30

Generally a temperature scale is established by using certain physical properties of a material which varies

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
2 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
3 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
4 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
5 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
6 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
7 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
8 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
9 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
10 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

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