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	If a process cannot be retraced in the backward direction by reversing the controlling factors, it is	A. a reversible process B. an irreversible process C. any one of them D. both of them
2	The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at	A. 100 K B. 273 K C. 0 K D. -273 K
3	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
4	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. -20°C B. 6.67°C C. 5°C D. 0°C
5	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	A. Clausius statement of second law B. Kelvin'sstatement of second law C. Clausius statement of first law D. Kelvin's statement of first law
6	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
7	On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed	A. adiabatically B. isothermally C. isochorcally D. isobarically
8	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
9	The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to	A. 300°C B. 573°C C. 600°C D. 743°C
10	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

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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

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

We can express the work in term of

In thermodynamics, internal energy is the function 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:

While deriving equation of pressure by kinetic theory of gases, we take into account:

During the whole carnot cycle

A process in which no heat enters or leaves the system is called

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

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

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

No spark plug is needed in

A carnot cycle consists of

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

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

At constant temperature, if the density of the gas is increased, its pressure will:

Pressure exerted by a gas is

One kilogram of different substances contain

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

First law of thermodynamic is special case of

At what temperature the adiabatic change is equivalent to the isothermal change?

Energy gas behaves like an ideal gast at

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

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

The pressure exerted by the gas is

A heat engine is that which converts

At constant volume temperature is increased. Then

Heat travels through vacuum by

If the volume of the gas is to be increased by 4 times, then

Internal energy is the sum of all the forms of

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

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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: