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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ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	When two objects come to common temperature, the body is said to be in:	A. Static equilibrium B. Dynamic equilibrium C. Thermal equilibrium 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	The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is	A. 70% B. 100% C. 35% D. 38%
4	Triple point of water is	A. 273.16°F B. 372.16K C. 273.16°F D. 273.16
5	The basis to define a temperature scale that is independent of material properties is provided by	A. carbon cycle B. nitrogen cycle C. Carnot cycle D. irreversible cycle
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	On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands	A. adiabatically B. isothermally C. isochorically D. isobarically
8	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
9	According to kinetic theory of gases, molecules of a gas behave like	A. Inelastic spheres B. Perfectly elastic rigid sphere C. Perfectly elastic non-rigid spheres D. Inelastic non-rigid spheres
10	The state in which ice, water and vapour coexists in equilibrium is called	A. zero degree celsius B. zero degree fahrenheit C. absolute zero D. 373 K

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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

Absolute temperature can be calculated by

Adiabatic change occurs when the gas

The example of irreversible process is

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

The example of reversible process is

Triple point of water is

Brownian motion increases due to

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

The Boltzman constant has the value

Hotness and coldness of an object is represented in terms:

A heat engine is that which converts

At constant volume temperature is increased. Then

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

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

Good absorbers of heat are

In an adiabatic expansion, the temperature of the gas

A succession of events which bring the system back to its initial condition is called

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

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

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

An isochoric process is one which take place at

In an ideal gas, the molecules have:

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

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:

We can express the work in term of

The earliest heat engine was

The absolute temperature of the tripple point of water is

Pressure of a gas at constant volume is proportion to

Energy gas behaves like an ideal gast at

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ECAT Physics Chapter 11 Important MCQ's

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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: