Question # 1

To which law of thermodynamics, the concept of temperature is related to.

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Zeroth law

First law

Second law

Third law

During an adiabatic gas expansion the environment

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Serves as a heat sink

Serves as a heat source

Must be at a higher temperature than the gas

Does not have to participate

Why freezer a refrigerator is located in the top section

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Motor is not affected

Heat gained from environment is less

The entire chamber of freezer is cooled quickly

Heat gained from environment is more

The law of equation of energy is applicable to the system whose constituents are.

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At rest

In orderly motion

in random motion

Moving at constant speed

Mean free path of gas molecules is inversely proportional to its.

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Volume

Pressure

Temperature

Weight

The heat accepted and rejected by a Carnot engine operating between two heat reservoirs defines.

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The efficiency of the working substance of the engine

the ideal gas scale of temperature

The ratio of the absolute temperature of the reservoirs

The thermal capacity of the working substance

The efficiency of a diesel engine is about

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15% to 35 5

355 to 40%

45% to 655

505 to 65 %

In which given process does the system always return to the original thermodynamic state.

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Cyclic

Adiabatic

isothermal

Isobaric

What kind of movement is dictated by the laws of thermodynamcis.

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Energy motion

Heat work

Light heat

Energy light

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 pressure of a gas is directly proportions to

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Mean velocity of the molecules

Mean square velocity of the molecules

Root mean square velocity of the molecules

Instantaneous velocity of the molecules

A gas thermometer is more sensitive than a mercury thermometer because the expansion of gas for 1 o/c rise in temperature is.

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Five times as much as mercury

Ten times as much as mercury

Twenty times as much as mercury

Hundred times as much as mercury

The pressure necessary to liquify a gas at the critical temperature is called.

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Normal pressure

Atmospheric pressure

Critical pressure

Liquid pressure

Efficiency of a Carnot engine can never be 1 or 100% unless cold reservoir is at absolute temperature.

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0 K

100 K

273 K

373 K

Which gas strictly obeys gas laws.

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Hydrogen gas

Inert gas

Ideal perfect gas

Helium gas

What is the minimum number of thermodynamic parameters required to specify the state of gas system.

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1

2

3

Infinite

A perfect gas is one whose

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Molecules are masless

Molecules are energetic

Molecules are perfectly elastic

Molecules are at rest

The kinetic molecular model of matter describe matter an being made up of molecules in continuous.

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Vibratory motion

Random motion

rotatory motion

Linear motion

Below which temperature gas can be liquified by increasing its pressure.

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Natural temperature

Boyle temperature

Critical temperature

Absolute zero

The gas thermometer is taken as the primary standard because.

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Thermometers are easily reproducible

Readings can be accurately taken

No correction are necessary

It produces he thermodynamic scale

Which of the following is a clinical thermometer.

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Gas thermometer

Mercury thermometer

Alcohol thermometer

Radiation thermometer

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