ECAT Pre Computer Science Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Physics Chapter 11 Heat & Thermodynamics

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ECAT Physics Chapter 11 Heat & Thermodynamics

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Question # 1

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 2

At O° K which of the following properties of a gas will be zero?

Question # 3

The Boltzman constant has the value

Question # 4

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 5

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 6

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 7

Absolute temperature can be calculated by

Question # 8

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 9

Maximum density of H2O is at the temperature

Question # 10

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

Question # 11

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

Question # 12

During the whole carnot cycle

Question # 13

Brownian motion increases due to

Question # 14

If an amount of heat enters the system it could

Question # 15

The ideal gas law is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
3 Pressure exerted by a gas is
A. Independent of density of the gas
B. Inversely proportional to the density of the gas
C. Directly proportional to the square of the density of the gas
D. Directly proportional to the density of the gas
4 A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
A. 1/2
B. More than 1/2
C. Less than 1/2
D. Between 1 and 2
5 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
6 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
7 The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be
A. 2.0 x 10-5/°C
B. 4.0x10-5/°C
C. 6.0x10-5/°C
D. 2.33x10-5/°C
8 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
9 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
10 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these

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