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

Top Scorers Of ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics MCQ`s Test

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Malik Farhan 26 - Jan - 2019 08 Min 09 Sec 80/120
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Israr Ahmed 09 - Mar - 2024 17 Min 46 Sec 60/120
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Waleed Ahmed 24 - Feb - 2023 05 Min 43 Sec 50/120
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Maliha afridi 25 - Oct - 2018 11 Min 47 Sec 50/120
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Gimi tunio 30 - Jun - 2018 26 Min 00 Sec 45/120
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Malik Farhan 23 - May - 2021 07 Min 14 Sec 35/120
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Farhan Sial 30 - Aug - 2018 09 Min 36 Sec 30/120
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Ahmed Ali Shah 07 - Nov - 2023 01 Min 01 Sec 25/120
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kamal deep 17 - Jun - 2023 02 Min 55 Sec 20/120
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hamza abid 27 - Jan - 2022 10 Min 50 Sec 20/120
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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

Sr. #	Question	Answer
1	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	A. 0 J B. 2 J C.5 J D. 10 J
2	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
3	The work done on the system by the environment is considered as	A. positive B. negative C.zero D. any one of them
4	Sadi carnot described an ideal heat engine in	A. 1820 B. 1840 C.1860 D. 1880
5	The motion of molecules in gases is:	A. Orderly B. Random C.Circular D. All of these
6	Generally a temperature scale is established by using certain physical properties of a material which varies	A. nonlinearly with temperature B. linearly with temperature C.either of them D. none of them
7	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
8	We can express the work in term of	A. directly measurable variables B. indirectly measurable variables C.either of them D. both of them
9	The example of reversible process is	A. an explosion B. changes occur suddenly C.slow compression of a gas D. all of them
10	When heat is removed from the system	A. negative B. positive C.zero D. any one of them
11	The temperature of gas is produced by	A. At potential energy of its molecules B. The kinetic energy of its molecules C.The attractive force between its molecules D. The repulsive force between its molecules
12	Boyle's law is applicable in	A. Isochoric process B. Isothermal process C.Isobaric process D. Isotonic process
13	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. 2V B. 3V C.0.5V D. V
14	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
15	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
16	The pressure of gas everywhere inside the vessel will be the same provided the gas is of	A. Non-uniform density B. uniform density C.high density D. low density
17	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	A. -20°C B. 6.67°C C.5°C D. 0°C
18	In which process the condition for the application of Boyle's law on the gas is fulfilled	A. isochoric process B. adiabatic process C.isothermal process D. none of them
19	Generally a temperature scale is established by	A. one fixed point B. two fixed point C.three fixed point D. four fixed point
20	The heat required to raise the temperature of one mole of the substance through 1 K is called	A. heat capacity B. specific heat capacity C.molar specific heat D. all of them
21	A diatomic gas molecule has	A. translational energy B. rotaional energy C.vibrational energy D. all of them
22	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. 300°C B. 573°C C.600°C D. 743°C
23	Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is	A. 1 : 2 B. 2 : 3 C.3 : 4 D. 8 : 9
24	The percentage of available heat energy converted into work by a diesel engine is roughly	A. 35 %` B. 40 % C.35 - 40 % D. 25 %
25	A process is a reversible process, if the entropy of the system	A. increases B. decreases C.remains constant D. none of them
26	The only significant motion possessed by the mono-atomic gas represented is:	A. Translatory B. Rotatory C.Vibratory D. None of these
27	At constant temperature, if the density of the gas is increased, its pressure will:	A. One kg of a substance B. Unit volume of a substance C.One mole of a substance D. None of these
28	The curve representing an adiabatic process is called	A. isotherm B. adiabat C.adiable D. none of them
29	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
30	The efficiency of petrol engine is usually not more than 25% to 30% because of	A. friction B. heat losses C.both of them 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

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

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

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

The ideal gas law is

A diatomic gas molecule has

Absolute zero is considered as that temperature at which:

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

In thermodynamics, internal energy is the function of

Good absorbers of heat are

No spark plug is needed in

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

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

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

Which of the following is a state variable

For making cooking utensils, which of the following pairs of properties is most suited?

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

When heat is added into the system then change in entropy is

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

At constant volume temperature is increased. Then

The volume of universal gas constant R is:

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

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

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

The curve representing an adiabatic process is called

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

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

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

Efficiency of carnot engine is independent of the

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

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Top Scorers Of ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics MCQ`s Test

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