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	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	A. A greater than than of B B. A is equal to that of B C. A is less than that of B D. A is twice the pressure of B
2	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
3	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
4	First law of thermodynamics is consequence of conservation of	A. Work B. Energy C. Heat D. All of these
5	Which of the following is a state variable	A. entropy B. pressure C. volume D. all of them
6	An irreversible heat flow from a hot to cold substances of a system, causes the disorder to	A. decrease B. remains the same C. increase D. any one of them
7	The only significant motion possessed by the mono-atomic gas represented is:	A. Translatory B. Rotatory C. Vibratory D. None of these
8	A typical four stroke petrol engine undergoes how many successive processes in each cycle	A. one B. two C. three D. four
9	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
10	In the formula P = N₀KT, N₀denotes:	A. Number of molecules per unit per volume B. Number of moles C. Number of molecules D. None of these
11	While deriving the equation for pressure of a gas we consider the	A. rotational motion of molecules B. vibrational motion of molecules C. linear motion of molecules D. all of them
12	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
13	One kilogram of different substances contain	A. same number of molecules B. different number of molecules C. may be same or different D. none of them
14	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	A. second law thermodynamics B. first law of thermodynamics C. third law of thermodynamics D. none of them
15	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
16	Gas constant per molecule is called:	A. Universal gas constant B. Stefen's constant C. Boltzmann constant D. Gravitation constant
17	Truth of kinetic energy is confirmed by:	A. Diffusion of gases B. Brownian motion C. Both A and B D. None of these
18	The curve representing an isothermal process is called	A. adiabat B. isotherm C. fixed temperature D. none of them
19	At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:	A. Double B. Remains constant C. Half D. None of these
20	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
21	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
22	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	A. Clausius statement of second law B. Kelvin'sstatement of second law C. Clausius statement of first law D. Kelvin's statement of first law
23	We cannot utilize the heat contents of oceans and atmosphere because	A. there is no reservoir at the same temperature B. there is no reservoir at the temperature lower than any one of two C. there is no reservoir at the temperature higher than any one of two D. none of them
24	The volume of universal gas constant R is:	A. 8.314 J/K mole K B. 8314 J/K mole K C. 8.314 J/mole K D. None of these
25	Pressure exerted by a gas is	A. Independent of density of the gas B. Inversely proportional to the density of the gas C. Directly proportional to the square of the density of the gas D. Directly proportional to the density of the gas
26	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
27	If the distance between two charges is doubled, the force between them will become:	A. Double B. Half C. Three times D. One fourth
28	The disorder in the system increases due to the	A. removal of heat B. addition of heat C. removal or addition of heat D. none of them
29	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}
30	In an adiabatic expansion, the temperature of the gas	A. increases B. becomes zero C. decreases D. decreases rapidly

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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

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

If an amount of heat enters the system it could

Boyle's law is applicable in

The concept of entropy was introduced into the study of thermodynamics in

We can express the work in term of

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

Carnot heat engine only used

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

At absolute temperature, the kinetic energy of the molecules

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

Rate of diffusion is

During the whole carnot cycle

Which of the following is a state variable

When heat is removed from the system

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

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

Electromagnetic waves emitted by hot bodies are called:

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

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

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

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

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

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

Internal energy is the sum of all the forms of

Brownian motion increases due to

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

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

At constant volume temperature is increased. Then

Adiabatic change occurs when the gas

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

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