Question # 1

When an ideal gas is expanded keeping its temperatur econsitant, its internal energy

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Increases

Remains the same

Decreases

Cannot be determined

What type of motion is of the molecules in a gas.

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Random motion

Linear motion

Vibratory motion

Rotatory motion

How many phases of mater are there.

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2

1

3

4

One disadvantage of using alcohol in a liquid in glass therometer.

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It wets the glass tube

It has large expansivity

It has low freezign point (-112 oC)

Its expansion is linear

Which of the following can increase the sensitivity of liquid in glass thermometer.

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Changes colour on temperture

Use a longer capillary tube

Use a bigger bulb which contains more amount of liquids

Using long specific its

The temperature which has the same value on Celcius and Fahrenheit scale is.

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-45

+40

-40

+45

A thermometer has a narrow capillary tube so that it.

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Gives alarge chagne for a given temperture rise

Quickly responds to temperature changes

Can read the maximum temperature

Can measure a large range of temperature.

Heat is the

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The energy in transit

Total kinetic energy of the molecules

The internal energy

Work done by the olecules

In Kelvin scale, the temperature corresponding to melting point of ice is

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+273

-273

32

Zero

In which of the materials, particles have only vibrational motion.

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Liquids

Solid

Plasma

Gas

How dow the molecules in a solid behave.

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Move randomly

Move in a stragiht line rom hot to cold ends

Vibrate about their mean position

Rotate and vibrae randomly at their own positions

Which state of matter has particles that are highly compressible and can fill any container.

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Plasma

Solid

Gas

Liquid

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Physics 9th Class English Medium Unit 7 Online Test MCQs With Answers

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