Question # 1

Gas law PV = constant is for

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Adiabatic change

Isothermal changes

Isobaric changes

Isochoric changes

The Fahrenheit and Kelvin scales intersect at

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40

-40

140

-140

What is the amount of mechanical work done to melt 1 g of ic completely

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4.2 J

42 J

80 J

336 J

When a liquid is hated retaining its liquid sate then its molecules gain.

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K.E.

P.E

Heat energy

Chemical energy

The gas temperature is increased from 27 ^oC to 127 ^oC What is the ratio of mean kinetic energies.

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3/4

4/3

9/10

10/9

A perfect gas is one whose

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Molecules are masless

Molecules are energetic

Molecules are perfectly elastic

Molecules are at rest

On which parameter, the heat capacity of a material depends upon.

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Density of the material

Specific heat of the material

Temperature of the material

Structure of the material

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

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Isdobaric

Isochoric

Isothermal

Adiabatic

How do solar heat and light reach the Earth.

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By radiation

By convection

By conduction

By conduction and convection

The specific heat of a substance is a function of its

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mass

Weight

Volume

Molecular structure

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

An inflated tyre suddenly bursts As a result of this temperature of the surrounding

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Increases

Descreases

Remains constant

May increase or decrease

The change in entropy for any reversible cycle is identically

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Infinite

Positive

Negative

Zero

In general work done on or by a gas depends on.

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The initial state only

The final state only

The initial and final states

The initial state the final state and the path

A given mass of air occupies 12 m2 at normal atmospheric pressure if the pressure is increased to 4 times the original value without changing the temperature what volume will the air occupy.

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3 cm3

6 cm3

9 cm3

12 cm3

The total gain in entropy of the working substance in a Carnot cycle is.

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Positive

Negative

Infinite

Constant

When a fluid in a cylinder expands through a distance 'd' against a piston of area 'A' which is exerting a constant pressure 'P' the work done is equal by.

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PAD

PA/d

Pd/A

Pd/A2

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

Change in which parameter determines the work done by a gas during adiabatic prcoess.

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volume

Pressure

Temperature

Weight

Diffusion of gases occurs because the molecules of the

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Gas present in a higher concentration exerts a high pressure

Gases are different

Gasses attract each other

Gasses over about randomly

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