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	The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at	A. 546 K B. 273 K C. 546°C D. 273°C
2	At constant volume temperature is increased. Then	A. Collision on walls will be less B. Number of collisions per unit time will increase C. Collision will be in straight lines D. Collision will not change
3	When heat is added into the system then change in entropy is	A. negative B. positive C. zero D. any one of them
4	If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then	A. C_p- C_v= R B. C_p- C_{v < R} C. C_p- C_{v = 0} D. C_p- C_{v > R}
5	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
6	The percentage of available heat energy converted into work by a petrol engine is roughly	A. 35 % B. 40 % C. 35 to 40 % D. 25 %
7	Which of the following is not an assumption of kinetic energy	A. a finite volume of gas consists of very large number of molecules B. the gas molecules are in random motion C. collision between the gas molecules are inelastic D. the size of the gas molecules is much smaller than the separation between molecules
8	The curve representing an isothermal process is called	A. adiabat B. isotherm C. fixed temperature D. none of them
9	When two objects are rubbed together, their internal energy	A. remains same B. decreases C. remains the same then decreases D. increases
10	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

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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 work done on the system by the environment is considered as

According to the second law, which is must to produce work

No spark plug is needed in

Truth of kinetic energy is confirmed by:

In the study of thermodynamics, which gas is considered as the working substance

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Boyle's law is applicable in

A reversible cycle is the one in which

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

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

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

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

During the whole carnot cycle

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

Rice takes longest to cook

The Boltzman constant has the value

Sadi carnot described an ideal heat engine in

The ideal gas law is

Generally a temperature scale is established by using certain physical properties of a material which varies

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

The example of irreversible process is

The rate of change of momentum of a molecule is equal to:

The percentage of available heat energy converted into work by a diesel engine is roughly

The value of E0in coulomb's law is:

The efficiency of diesel engine is

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

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Heat travels through vacuum by

The absolute temperature of the tripple point of water is

One mole of any substance contain

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ECAT Physics Chapter 11 Important MCQ's

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The value of E₀in coulomb's law is: