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	A process is a reversible process, if the entropy of the system	A. increases B. decreases C. remains constant D. none of them
2	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
3	Specific heat at constant pressure is greater than the specific heat at constant volume because	A. Heat is used up to increase temperature at constant pressure B. Heat is used by gas for expansions purposes at constant pressure C. Heat is use dup to increase internal energy D. The above statement is invalid
4	The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to	A. 0°C B. 10°C C. 17°C D. 20°C
5	The absolute temperature for an ideal gas is	A. directly proportional to the rotational K.E of gas molecules B. directly proportional to the vibrational K.E of gas molecules C. directly proportional to the average translational K.E.of gas molecules D. directly proportional to the P.E. of gas molecules
6	In thermodynamics, internal energy is the function of	A. temperature B. pressure C. state D. none of them
7	The curve representing an adiabatic process is called	A. isotherm B. adiabat C. adiable D. none of them
8	In an ideal gas, the molecules have:	A. Kinetic energy only B. Potential energy only C. Both KE and PE D. None of these
9	First law of thermodynamic is special case of	A. Law of conservation of energy B. Charle's law C. Law of conservation of mass D. Boyle's law
10	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

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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 volume of universal gas constant R is:

If the formula PV = nRT, n denotes:

Which of the following is not an assumption of kinetic energy

The temperature of gas is produced by

A process in which no heat enters or leaves the system is called

The nature of thermal radiation is similar to:

The only significant motion possessed by the mono-atomic gas represented is:

The process which is carried out at constant temperature is known as

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

In a heat engine, heat is supplied by the

A heat engine is that which converts

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

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

The state in which ice, water and vapour coexists in equilibrium is called

Which of the following is not thermo dynamical function?

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

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Heat travels through vacuum by

In an adiabatic process the work is done at the expense of the

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

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

The example of reversible process is

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

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

Carnot heat engine only used

On colliding in a closed container, the gas molecules

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:

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

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

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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: