Question # 1

Pascal is the unit of

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Pressure

Force

Tension

Weight

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

In the thermodynamics process , the equation W = -delta U represents.

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Isothermal expension

Isothermal compression

Adiabatic expansion

Adiabatic compression

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

Almost all the raw energy is librated from

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Heat

Earth

Light

All of these

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

Efficiency of steam locomotive is.

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8%

10%

9%

7%

In case the work done in zero.

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Constant pressure

Constant volume

Constant temperature

Constant mass

The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

Mercury is used as a thermometric substance because

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It is opaque

Does not stick to glass

Has low specific heat

All of these

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

Environmental crisis are also known as

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Population crisis

Entropy crisis

War crisis

Mass crisis

A device based upon the thermodynamics property of matter is called.

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Calorimeter

Heat engine

thermometer

Voltmeter

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

The Carnot cycle can be shown by which graph

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P - T graph

P - V Graph

V- T graph

PV -T graph

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

Heat is form of.

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Power

Momentum

Energy

Torque

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

Entropy remains constant.

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

For an ideal gas, the internal energy is directly proportional to.

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Pressure

volume

Mass

Temperature

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

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