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 bicycle pump provides a good example of	A. first law of thermodynamics B. second law of thermodynamics C. third law of thermodynamics D. none of them
2	If a process cannot be retraced in the backward direction by reversing the controlling factors, it is	A. a reversible process B. an irreversible process C. any one of them D. both of them
3	Which of the following is not an example of adiabatic process	A. the rapid escape of air from a burst type B. the rapid expansion and compression of air through which a sound wave is passing C. cloud formation in the atmosphere D. none of them
4	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
5	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
6	Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called	A. heat capacity B. specific heat capacity C. specific heat at constant volume D. specific heat at constant pressure
7	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
8	Adiabatic change occurs when the gas	A. expands B. compressed C. expands or compressed D. expands or compressed rapidly
9	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%
10	Which quantity is important in stating the entropy of the system	A. initial entropy B. final entropy C. change in entropy D. none of them

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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

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

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

Adiabatic change occurs when the gas

Which quantity is important in stating the entropy of the system

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

In case of an ideal gas, the P.E associated with its molecule is

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

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

One kilogram of different substances contain

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

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Energy gas behaves like an ideal gast at

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

Hotness and coldness of an object is represented in terms:

Absolute zero is considered as that temperature at which:

Rice takes longest to cook

Brownian motion increases due to

Specific heat at constant pressure is greater than the specific heat at constant volume because

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

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

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

Rate of diffusion is

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

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

In thermodynamics, internal energy is the function of

Which of the following does not have the same units:

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

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ECAT Physics Chapter 11 Important MCQ's

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If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then