Question # 1

Advantage of using gases as thermornetic substrates is taht

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Gases have a small coefficient of expansion

Expansion of gases is irregular

Gases can be obtained in pure form

Gases have a large coefficient of expansion.

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

Gas exert pressure on walls of the visual because gas molecules.

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Posses momentum

Have finite volume

Collide with each other

Obey gas laws

A 4 kJ mass of copper of specific heat capacity of 400 J kg-1k-1 is heated for 160 s by a heater of power 200 W what is the rise in temperature.

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10 K

16 K

100 K

160 K

If two gases have same reduced pressure volume and temperature it is according to

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Boyle's law

Charles law

Law of corresponding state

Zeroth law

Which kind of thermodynamic process is defined as with no heat transfer into or out of a system i.e. Q =0

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Isobaric process

Isochoric process

Isothermal process

Adiabatic process

The process in which no heat enters or leaves the system is called.

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Isdobaric

Isochoric

Isothermal

Adiabatic

The SI unit of heat capacity is.

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kg J

Kg J-1

J K-1

Kg J-1 K-1

The behavior of the gases that can be easily liquefied is like that of the.

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Triatomic gases

Ideal gases

Van der walls gases

Dia atomic gases

Which law states that if two systems are in thermal equilibrium with a third system they are also in the thermal equilibrium with each other.

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Third law of thermodynamics

Second law of thermodynamics

First law of thermodynamics

Zeroth law of thermodynamics

If the gas pressure is increased then its mean free path becomes.

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More

Zero

Infinite

Less

Which of the following thermometers is the most suitable for measuring rapidly varying temperature.

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Thermocouple thermometer

Mercury in glass thermometer

Alcohol in glass thermometer

Platinum resistance thermometer

How solid hydrogen is obtained.

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By cascade process

By joule kelvin effect

By adiabatic expansion

Lowering temperature below melting point

Which of the following measures how quickly the thermometer liquid mainly because it

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Is coloriess

Is a bad conductor of heat

Does not expand linearly

Has a low boiling point

What is the internal energy of a mono atomic ideal gas.

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Potential only

Parity kinetic and parity potential

Kinetic only

Neither kinetic nor potential

In the gas equation PV =nRT , V is the volume of.

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1 g of gas

1 L of gas

1 mol of gas

1 kg of gas

The mechanical equivalent of heat is.

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Physical quantity

Constant

Conversion factor

Zero

Which of the following can be used visualize the third law thermodynamics

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Light

Heat

Water

All of these

The ratio of specific heat capacity to motor heat capacity of a body

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Is a universals cantante

Depends upon the mass of the body

Depends upon the molecular weight of the body

Is dimensionless

Contrivances for converting heat into work are called.

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Heat pumps

Heat engines

IC engines

Jet engine

Temperature of a gas is related to.

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Total K.E. of the gas molecules

The K.E. of the centre of mass of the gas

The P.E. of the centre of mass of the gas

Total K.E. of the molecules w.r.t the centre of mass of gas

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