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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Frankie 09 - Sep - 2022 01 Min 29 Sec 0/120

ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	The pressure exerted by the gas is	A. directly proportional to the P.E B. inversely proportional to the P.E C. inversely proportional to the K.E D. directly proportional to the K.E
2	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	A. 0°C B. 10°C C. 17°C D. 20°C
3	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
4	If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is	A. 2 : 1 B. 4 : 1 C. 1 : 4 D. 3 : 4
5	The internal energy of an ideal gas system is generally the	A. translational K.E of molecules B. vibrational K.E of molecules C. rotational K.E of molecules D. all of them
6	The efficiency of diesel engine is	A. 25% B. 25 - 30% C. 35% D. 35 - 40%
7	Which of the following is not an example of adiabatic process	A. the rapid escape of air from a burst type B. the rapid expansion and compression of air through which a sound wave is passing C. cloud formation in the atmosphere D. none of them
8	A succession of events which bring the system back to its initial condition is called	A. reversible process B. irreversible process C. a cycle D. none of them
9	The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called	A. heat capacity B. specific heat capacity C. molar specific heat D. molar specific heat at constant volume
10	First law of thermodynamics is consequence of conservation of	A. Work B. Energy C. Heat D. All of these

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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 number of translation degress of freedom for a diatomic gas is

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

The temperature of gas is produced by

The motion of molecules in gases is:

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

Rice takes longest to cook

In thermodynamics, internal energy is the function of

Pressure of a gas at constant volume is proportion to

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

Energy gas behaves like an ideal gast at

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

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

Pressure exerted by a gas is

On colliding in a closed container, the gas molecules

When heat is removed from the system

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

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

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:

Triple point of water is

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

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

In which process the condition for the application of Boyle's law on the gas is fulfilled

Absolute temperature can be calculated by

Absolute zero is considered as that temperature at which:

A heat engine is that which converts

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

Amount of heat required to raise the temperature of a body through 1 K is called its

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

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

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ECAT Physics Chapter 11 Important MCQ's

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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: