ECAT Pre General Science Chapter 11 online mcq test with answers for Physics chapter 11 (Heart & Thermodynamics)

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Mohsin rajput Rajput 21 - Sep - 2025 06 Min 38 Sec 9/30
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Frankie 09 - Sep - 2022 01 Min 29 Sec 0/120

ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed	A. adiabatically B. isothermally C. isochorcally D. isobarically
2	A succession of events which bring the system back to its initial condition is called	A. reversible process B. irreversible process C. a cycle D. none of them
3	The motion of molecules in gases is:	A. Orderly B. Random C. Circular D. All of these
4	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
5	Real gases strictly obey gas law at:	A. High pressure and low temperatures B. Low pressures and high temperatures C. High pressures and high temperatures D. None of these
6	The example of irreversible process is	A. slowly liquification B. slowly evaporation C. an explosion D. all of them
7	The pressure exerted by the gas is	A. directly proportional to the P.E B. inversely proportional to the P.E C. inversely proportional to the K.E D. directly proportional to the K.E
8	The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called	A. heat capacity B. specific heat capacity C. molar specific heat D. molar specific heat at constant volume
9	The behaviour of gases is well accounted by the kinetic theory based on	A. microscopic approach B. macroscopic approach C. both of them D. none of them
10	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

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ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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

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

In thermodynamics, internal energy is the function of

Internal energy is the sum of all the forms of

In all natural processes where heat flows from one system to another, there is always a net

Sadi carnot described an ideal heat engine in

Melting point of ice

The value of E0in coulomb's law is:

If the distance between two charges is doubled, the force between them will become:

In which process the condition for the application of Boyle's law on the gas is fulfilled

Absolute temperature can be calculated by

Generally a temperature scale is established by

The pressure exerted by the gas is

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

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

A reversible cycle is the one in which

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

The volume of universal gas constant R is:

The nature of thermal radiation is similar to:

Adiabatic change occurs when the gas

While deriving equation of pressure by kinetic theory of gases, we take into account:

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

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

The efficiency of diesel engine is

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

The curve representing an isothermal process is called

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

Which of the following does not have the same units:

A real gas can be approximated to an ideal gas at

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:

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ECAT Physics Chapter 11 Important MCQ's

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The value of E₀in coulomb's law is:

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: