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	On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands	A. adiabatically B. isothermally C. isochorically D. isobarically
2	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:	A. Force B. Density C. Work done D. Pressure
3	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
4	At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be	A. 81 K B. 355 K C. 627 K D. 627°C
5	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
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	In case of an ideal gas, the P.E associated with its molecule is	A. maximum B. zero C. minimum D. not fixed
8	Hotness and coldness of an object is represented in terms:	A. Heat B. Temperature C. Chemical energy D. None of these
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	Brownian motion increases due to	A. Increase in size of Brownian particle B. Increase in temperature of medium C. Increase in density of medium D. Increase in viscosity of medium

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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

In an adiabatic expansion, the temperature of the gas

The second law of thermodynamics is concerned with the circumstances in which

A diatomic gas molecule has

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

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

When heat is removed from the system

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

A real gas can be approximated to an ideal gas at

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

Efficiency of carnot engine is independent of the

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

The value of E0in coulomb's law is:

The work done on the system by the environment is considered as

One kilogram of different substances contain

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

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

The absolute temperature for an ideal gas is

At O° K which of the following properties of a gas will be zero?

Boyle's law is applicable in

Which of the following is a state variable

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

The behaviour of gases is well accounted by the kinetic theory based on

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Good absorbers of heat are

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

The unit of thermodynamical scale is

The pressure exerted by the gas is

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Generally a temperature scale is established by

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ECAT Physics Chapter 11 Important MCQ's

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The value of E₀in coulomb's law is: