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 value of E₀in coulomb's law is:	A. 9 x 10⁹Nm²C^-2 B. 8.85 x 10^-12C²N^-1m^-2 C. 8.85 x 10^-12Nm²C^-2 D. 9 x 10⁹C²N^-1m^-2
2	In an ideal gas, the molecules have:	A. Kinetic energy only B. Potential energy only C. Both KE and PE D. None of these
3	Heat travels through vacuum by	A. Conduction B. Convection C. Radiation D. Both A and B
4	At constant temperature, if the density of the gas is increased, its pressure will:	A. One kg of a substance B. Unit volume of a substance C. One mole of a substance D. None of these
5	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
6	One kilogram of different substances contain	A. same number of molecules B. different number of molecules C. may be same or different D. none of them
7	When heat is removed from the system	A. negative B. positive C. zero D. any one of them
8	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
9	If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then	A. C_p- C_v= R B. C_p- C_{v < R} C. C_p- C_{v = 0} D. C_p- C_{v > R}
10	While deriving equation of pressure by kinetic theory of gases, we take into account:	A. Only linear motion of molecules B. Only rotational motion C. Only vibratory motion 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

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

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:

If an amount of heat enters the system it could

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

When heat is removed from the system

The motion of molecules in gases is:

Electromagnetic waves emitted by hot bodies are called:

Absolute temperature can be calculated by

The Boltzman constant has the value

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

Pressure of a gas at constant volume is proportion to

Real gases strictly obey gas law at:

If the distance between two charges is doubled, the force between them will become:

Carnot heat engine only used

A reversible cycle is the one in which

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

Gas constant per molecule is called:

At absolute temperature, the kinetic energy of the molecules

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

The ideal gas law is

The absolute temperature of the tripple point of water is

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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

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

If a liquid is heated in weightlessness, the heat is transmitted through

Melting point of ice

Rice takes longest to cook

The curve representing an adiabatic process is called

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

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

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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: