ECAT Pre General Science Chapter 11 online mcq test with answers for Physics chapter 11 (Heart & Thermodynamics)

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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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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	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
2	Hotness and coldness of an object is represented in terms:	A. Heat B. Temperature C. Chemical energy D. None of these
3	The behaviour of gases is well accounted by the kinetic theory based on	A. microscopic approach B. macroscopic approach C. both of them D. none of them
4	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
5	The temperature of gas is produced by	A. At potential energy of its molecules B. The kinetic energy of its molecules C. The attractive force between its molecules D. The repulsive force between its molecules
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	A process is a reversible process, if the entropy of the system	A. increases B. decreases C. remains constant D. none of them
8	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
9	Boyle's law is applicable in	A. Isochoric process B. Isothermal process C. Isobaric process D. Isotonic process
10	Rate of diffusion is	A. Faster in solids than in liquids and gases B. Faster in liquids than in solids and gases C. Equal to solids, liquids and gases D. Faster in gases than in liquids and solids

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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

Electromagnetic waves emitted by hot bodies are called:

The efficiency of diesel engine is

In a heat engine, heat is supplied by the

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

First law of thermodynamics is consequence of conservation of

On colliding in a closed container, the gas molecules

We cannot utilize the heat contents of oceans and atmosphere because

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

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

The nature of thermal radiation is similar to:

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

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

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

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

The absolute temperature of the tripple point of water is

Sadi carnot described an ideal heat engine in

Pressure exerted by a gas is

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

A real gas can be approximated to an ideal gas at

No spark plug is needed in

One mole of any substance contain

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

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

For the working of a heat engine, there must be

While deriving the equation for pressure of a gas we consider the

In all natural processes where heat flows from one system to another, there is always a net

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

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

Absolute zero is considered as that temperature at which:

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

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ECAT Physics Chapter 11 Important MCQ's

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