Question # 1

A carnot cycle consists of

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One step

two step

three steps

four steps

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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0 J

2 J

5 J

10 J

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

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Pressure

Work

Density

Force

The concept of entropy was introduced into the study of thermodynamics in

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1856

1865

1656

1685

Sadi carnot described an ideal heat engine in

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1820

1840

1860

1880

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

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ML²T^-2

MT^-2

ML^-1T^-1

None of these

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

Adiabatic change occurs when the gas

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expands

compressed

expands or compressed

expands or compressed rapidly

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

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Ideal gas

Inert gas

Real gas

None of these

First law of thermodynamic is special case of

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Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

Rate of diffusion is

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Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

The curve representing an adiabatic process is called

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isotherm

adiabat

adiable

none of them

The example of irreversible process is

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slowly liquification

slowly evaporation

an explosion

all of them

In the reverse process, the working substance passes through the same stages as in the direct process and

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thermal effects at each stage are exactly reversed

mechanical effects at each stage are exactly reversed

thermal and mechanical effects at each stage remain the same

thermal and mechanical effects at each stage are exactly reversed

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

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Translatory

Rotatory

Vibratory

None of these

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