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

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Sr.#	Question	Answer
1	Pressure of a gas at constant volume is proportion to	A. Total energy of gas B. Average P.E to molecules C. Average K.E of molecules D. Total internal energy of gas
2	A real gas can be approximated to an ideal gas at	A. Low density B. High pressure C. High density D. Low temperature
3	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
4	First law of thermodynamic is special case of	A. Law of conservation of energy B. Charle's law C. Law of conservation of mass D. Boyle's law
5	When two objects come to common temperature, the body is said to be in:	A. Static equilibrium B. Dynamic equilibrium C. Thermal equilibrium D. None of these
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	The earliest heat engine was	A. petrol engine B. diesel engine C. electric engine D. steam engine
8	Carnot heat engine only used	A. isothermal processes B. adiabatic processes C. both of them D. none of them
9	The pressure of gas everywhere inside the vessel will be the same provided the gas is of	A. Non-uniform density B. uniform density C. high density D. low density
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
11	A reversible cycle is the one in which	A. some of the changes are reversible B. all of the changes are reversible C. all of the changes are irreversible D. none of them
12	Melting point of ice	A. Increases with increasing pressure B. Decreases with increasing pressure C. Is independent of pressure D. Is proportional to pressure
13	The only significant motion possessed by the mono-atomic gas represented is:	A. Translatory B. Rotatory C. Vibratory D. None of these
14	Good absorbers of heat are	A. Poor emitters B. Non emitters C. Good emitters D. Highly polarized
15	Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called	A. heat capacity B. specific heat capacity C. specific heat at constant volume D. specific heat at constant pressure
16	According to kinetic theory of gases, molecules of a gas behave like	A. Inelastic spheres B. Perfectly elastic rigid sphere C. Perfectly elastic non-rigid spheres D. Inelastic non-rigid spheres
17	Real gases strictly obey gas law at:	A. High pressure and low temperatures B. Low pressures and high temperatures C. High pressures and high temperatures D. None of these
18	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
19	Pressure may be define as _______ per second per unit area:	A. Change in force B. Change in momentum C. Change in energy D. Work done
20	The percentage of available heat energy converted into work by a petrol engine is roughly	A. 35 % B. 40 % C. 35 to 40 % D. 25 %
21	In which process the condition for the application of Boyle's law on the gas is fulfilled	A. isochoric process B. adiabatic process C. isothermal process D. none of them
22	A diatomic gas molecule has	A. translational energy B. rotaional energy C. vibrational energy D. all of them
23	Generally a temperature scale is established by using certain physical properties of a material which varies	A. nonlinearly with temperature B. linearly with temperature C. either of them D. none of them
24	The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at	A. 546 K B. 273 K C. 546°C D. 273°C
25	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
26	If water in a closed bottle is taken up to the moon and opened, the water gets	A. Freeze B. Boiled C. Dissociated into O₂and H₂ D. Evaporated
27	The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :	A. 1.7 x 10³J B. 10.2 x 10³J C. 3..4 x 10³J D. 6.8 x 10³J
28	The absolute temperature for an ideal gas is	A. directly proportional to the rotational K.E of gas molecules B. directly proportional to the vibrational K.E of gas molecules C. directly proportional to the average translational K.E.of gas molecules D. directly proportional to the P.E. of gas molecules
29	The ideal gas law is	A. P = nRT B. V = nRT C. PV =RT D. PV =nRT
30	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

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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

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

An isochoric process is one which take place at

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

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

Efficiency of carnot engine is independent of the

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

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

In the theory of dimensional analysis, heat may be properly represented by:

Triple point of water is

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

In an adiabatic process the work is done at the expense of the

The volume of universal gas constant R is:

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

The value of E0in coulomb's law is:

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

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

Which of the following is a state variable

Maximum density of H2O is at the temperature

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

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Energy gas behaves like an ideal gast at

Absolute zero is considered as that temperature at which:

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

In case of an ideal gas, the P.E associated with its molecule is

Rate of diffusion is

Brownian motion increases due to

The pressure exerted by the gas is

Pressure exerted by a gas is

The ideal gas law is

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

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The value of E₀in coulomb's law is:

Maximum density of H₂O is at the temperature