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	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	A. R/2 B. P C.2P D. Depending on the relative mass of the gases
2	A reversible cycle is the one in which	A. some of the changes are reversible B. all of the changes are reversible C.all of the changes are irreversible D. none of them
3	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
4	The rate of change of momentum of a molecule is equal to:	A. Pressure B. Work C.Density D. Force
5	The process which is carried out at constant temperature is known as	A. adiabatic process B. isothermal process C.isochoric process D. none of them
6	In the reverse process, the working substance passes through the same stages as in the direct process and	A. thermal effects at each stage are exactly reversed B. mechanical effects at each stage are exactly reversed C.thermal and mechanical effects at each stage remain the same D. thermal and mechanical effects at each stage are exactly reversed
7	In the theory of dimensional analysis, heat may be properly represented by:	A. ML²T^-2 B. MT^-2 C.ML^-1T^-1 D. None of these
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 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
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
11	The work done by the system on its environment is considered as	A. positive B. negative C.zero D. any one of them
12	Pressure may be define as _______ per second per unit area:	A. Change in force B. Change in momentum C.Change in energy D. Work done
13	The ideal gas law is	A. P = nRT B. V = nRT C.PV =RT D. PV =nRT
14	If the volume of the gas is to be increased by 4 times, then	A. Temperature and pressure must be doubled B. At constant P the temperature must be increased by 4 times C.At constant T the pressure must be increased by four times D. It cannot be increased
15	If the formula PV = nRT, n denotes:	A. Number of molecules per unit volume B. Number of moles C.Number of molecules D. None of these
16	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
17	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
18	On colliding in a closed container, the gas molecules	A. Transfer momentum to the walls B. Momentum becomes zero C.Move in opposite directions D. Perform Brownian motion
19	The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at	A. 100 K B. 273 K C.0 K D. -273 K
20	For making cooking utensils, which of the following pairs of properties is most suited?	A. Low specific heat and high conductivity B. Low specific heat and low conductivity C.High specific heat and high conductivity D. High specific heat and low conductivity
21	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
22	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
23	In case of an ideal gas, the P.E associated with its molecule is	A. maximum B. zero C.minimum D. not fixed
24	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
25	A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called	A. reversible process B. irreversible process C.any one of them D. none of them
26	Heat travels through vacuum by	A. Conduction B. Convection C.Radiation D. Both A and B
27	A process in which no heat enters or leaves the system is called	A. isochoric process B. isothermal process C.adiabatic process D. none of them
28	10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?	A. Each have same number of molecules B. Don't have same number of molecules C.Can't be predicted D. None
29	The Boltzman constant has the value	A. 1.38 x 10^-23JK^-1 B. 1.28 x 10^-23JK^-1 C.1.38 x 10^-26JK^-1 D. 1.28 x 10^-26JK^-1
30	Internal energy is the sum of all the forms of	A. K.E B. P.E 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

One kilogram of different substances contain

An isochoric process is one which take place at

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

At absolute temperature, the kinetic energy of the molecules

When heat is removed from the system

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

The example of reversible process is

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

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

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

Average KE of a gas molecule has:

The efficiency of petrol engine is usually not more than 25% to 30% because of

Heat travels through vacuum by

Boyle's law is applicable in

During the whole carnot cycle

In an ideal gas, the molecules have:

Pressure exerted by a gas is

The disorder in the system increases due to the

If a liquid is heated in weightlessness, the heat is transmitted through

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

The bicycle pump provides a good example of

At constant temperature, if the density of the gas is increased, its pressure will:

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

The pressure exerted by the gas is

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

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

The absolute temperature of the tripple point of water is

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

The heat required to raise the temperature of one mole of the substance through 1 K is called

First law of thermodynamic is special case of

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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