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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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

ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	In the study of thermodynamics, which gas is considered as the working substance	A. real gas B. ideal gas C. any gas may be ideal or real D. none of them
2	When heat is removed from the system	A. negative B. positive C. zero D. any one of them
3	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
4	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
5	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
6	The work done by the system on its environment is considered as	A. positive B. negative C. zero D. any one of them
7	Electromagnetic waves emitted by hot bodies are called:	A. Photoelectrons B. Alpha rays C. Thermal radiation D. None of these
8	The temperature scale approved in SI units is:	A. Celsius scale B. Kelvin scale C. Fehrenheit scale D. None of these
9	A real gas can be approximated to an ideal gas at	A. Low density B. High pressure C. High density D. Low temperature
10	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

The nature of thermal radiation is similar to:

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

The earliest heat engine was

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

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

The relationship between Boltzmann constant k with R and NAis given as:

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

Real gases strictly obey gas law at:

When two objects come to common temperature, the body is said to be in:

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

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 ideal gas law is

In thermodynamics, internal energy is the function of

If the formula PV = nRT, n denotes:

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

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

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

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

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

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

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

Adiabatic change occurs when the gas

In the reverse process, the working substance passes through the same stages as in the direct process and

When two objects are rubbed together, their internal energy

According to kinetic theory of gases, molecules of a gas behave like

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

A succession of events which bring the system back to its initial condition is called

The Boltzman constant has the value

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ECAT Physics Chapter 11 Important MCQ's

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The relationship between Boltzmann constant k with R and N_Ais given as: