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

The ideal gas law is

Question # 2

The example of irreversible process is

Question # 3

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

Question # 4

The internal energy of a system does not depend upon the

Question # 5

The absolute temperature of the tripple point of water is

Question # 6

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 7

The product of the pressure and volume of an ideal gas is

Question # 8

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 9

Which of the following does not have the same units:

Question # 10

Efficiency of carnot engine is independent of the

Question # 11

When heat is removed from the system

Question # 12

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

Question # 13

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

Question # 14

Which of the following is not an example of adiabatic process

Question # 15

A process is a reversible process, if the entropy of the system

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
2 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
3 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
4 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
5 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
6 A reversible cycle is the one in which
A. some of the changes are reversible
B. all of the changes are reversible
C. all of the changes are irreversible
D. none of them
7 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
8 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
9 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
10 When the temperature of source and sink of a heat engine become equal entropy change will be
A. Zero
B. Max
C. Min
D. -ve

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