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

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ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	The rate of change of momentum of a molecule is equal to:	A. Pressure B. Work C. Density D. Force
2	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
3	In case of an ideal gas, the P.E associated with its molecule is	A. maximum B. zero C. minimum D. not fixed
4	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	A. 1 : 2 B. 2 : 3 C. 3 : 4 D. 8 : 9
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	Which of the following is not an assumption of kinetic energy	A. a finite volume of gas consists of very large number of molecules B. the gas molecules are in random motion C. collision between the gas molecules are inelastic D. the size of the gas molecules is much smaller than the separation between molecules
7	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
8	The percentage of available heat energy converted into work by a diesel engine is roughly	A. 35 %` B. 40 % C. 35 - 40 % D. 25 %
9	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
10	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

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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

Pressure of a gas at constant volume is proportion to

The disorder in the system increases due to the

Which of the following does not have the same units:

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

When two objects are rubbed together, their internal energy

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

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

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

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

Which of the following is not thermo dynamical function?

The Boltzman constant has the value

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

Internal energy is the sum of all the forms of

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

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

We can express the work in term of

First law of thermodynamics is consequence of conservation of

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

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

The absolute temperature for an ideal gas is

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

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

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

Hotness and coldness of an object is represented in terms:

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

During the whole carnot cycle

Pressure exerted by a gas is

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

The value of E0in coulomb's law is:

The efficiency of diesel engine is

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ECAT Physics Chapter 11 Important MCQ's

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The value of E₀in coulomb's law is: