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	Energy gas behaves like an ideal gast at	A. High temperature and low pressure B. Low temperature and high pressure C. Both A and B D. None
2	While deriving equation of pressure by kinetic theory of gases, we take into account:	A. Only linear motion of molecules B. Only rotational motion C. Only vibratory motion D. All of these
3	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
4	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
5	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
6	No spark plug is needed in	A. petrol engine B. diesel engine C. both of them D. none of them
7	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%
8	The example of irreversible process is	A. slowly liquification B. slowly evaporation C. an explosion D. all of them
9	Triple point of water is	A. 273.16°F B. 372.16K C. 273.16°F D. 273.16
10	In case of an ideal gas, the P.E associated with its molecule is	A. maximum B. zero C. minimum D. not fixed

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

The disorder in the system increases due to the

Internal energy is the sum of all the forms of

For the working of a heat engine, there must be

Which of the following is not thermo dynamical function?

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

Adiabatic change occurs when the gas

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

Truth of kinetic energy is confirmed by:

The rate of change of momentum of a molecule is equal to:

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

In the formula P = N0KT, N0denotes:

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

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

A typical four stroke petrol engine undergoes how many successive processes in each cycle

When two objects are rubbed together, their internal energy

Rate of diffusion is

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

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

Absolute zero is considered as that temperature at which:

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Pressure may be define as _______ per second per unit area:

Energy gas behaves like an ideal gast at

In the theory of dimensional analysis, heat may be properly represented by:

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

Heat travels through vacuum by

Absolute temperature can be calculated by

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

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ECAT Physics Chapter 11 Important MCQ's

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In the formula P = N₀KT, N₀denotes:

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the: