Punjab 9th Physics Ch 7 Thermal Properties of Matter Online Test Mcqs

Punjab Physics 9th Class: Chapter 7

Understand heat and temperature concepts in Chapter 7: Thermal Properties of Matter with our Punjab Board 9th Class Physics practice resources (New Syllabus 2025-26). This chapter covers kinetic molecular theory, temperature scales, thermometers, specific heat capacity, latent heat, thermal expansion, and phase changes. Our New Pattern MCQs Online Test includes conceptual questions on heat transfer, thermometer working, and thermal expansion applications. The Short Questions with Answers section provides detailed explanations of thermal concepts with formulas, conversions, and real-life examples. Practice chapter-wise to master thermal physics fundamentals and achieve excellent results in Punjab Board Physics examinations with confidence.

Punjab 9th Physics Ch 7 Thermal Properties of Matter Test Online Mcqs (New Syllabus)

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1. Which one is a better choice for a liquid-in-glass thermometer is that:

Is colourless

Expand linearly

Is a bad conductor

Wets glass

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2. Which thermometer is most suitable for recording rapidly varying temperature?

Alcohol-in-glass thermometer

Thermocouple thermometer

Mercury-in-glass clinical thermometer

Mercury-in-glass laboratory thermometer

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3. Temperature of substance is:

the total number of molecules in it

degree of hotness or coldness

dependent upon the intermolecular distance

the total amount of heat contained in it

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4. Heat is the:

the internal energy

work done by the molecules

total kinetic energy of the molecules

the energy in transit

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

zero

-273

32

+273

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

Liquid

Plasma

Solid

Gas

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7. Which Statement describes the particles structure of gases?

particles are arranged in a repeating pattern

Particles have fixed positions and low kinetic energy

particles have moderate kinetic energy and move randomly

particles are tightly packed and have strong bonds

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8. How many phases of matter are there?

1

4

2

3

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9. How do the molecules in a solid behave?

Rotate and vibrate randomly at their own positions

Move randomly

Vibrate about their mean position

Move in a straight line from hot to cold ends

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

Liquids

Gas

Plasma

Solid

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

Vibratory motion

Random motion

Rotatory motion

Linear motion

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12. Thermometer, which is most suitable for measuring rapid changing temperatures, is:

Constant volume gas thermometer

Thermocouple

Resistance thermometer

Liquid in glass thermometer

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13. When an ideal gas is expanded keeping its temperature constant, its internal energy:

Remains the same

Cannot be determined

Decreases

Increases

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14. Gases and liquids are categorized as:

Solids

Fluids

Gases

Liquids

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

Use a longer capillary tube

Changes colour on temperature

Use a bigger bulb which contains more amount of liquids

Using long specific its

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16. A thermometer has a narrow capillary tube so that it:

can read the maximum temperature

can measure a large range of temperature

quickly responds to temperature changes

gives a large change for a given temperature rise

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17. Mercury has uniform linear expansion in liquid in glass thermometers. A liquid in glass thermometer has a mercury level of 2cm at melting point of ice and a mercury level of 6cm at boiling point of water. What is the distance between every 1°C division on Celsius scale of thermometer?

1.00cm

0.04cm

0.06cm

0.08cm

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18. Which of the following is not a form of internal energy?

Kinetic energy of the particles

Potential energy of the particles

Light energy

Chemical energy of the bonds between the particles

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19. Water is not used as a thermometric liquid mainly due to:

a bad conductor of heat

colourless

a low boiling point (100°C)

non-linear expansion

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20. Which thermometer uses voltage to measure temperature of a hot body?

Gas thermometer

Resistance thermometer

Thermocouple

Liquid in glass thermometer

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21. The temperature which has the same value on Celsius and Fahrenheit scale is:

+40

+45

-45

-40

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22. What happens to the arrangement of particles when a solid is heated and turns into a liquid?

Particles move farther apart

Particles become more closely packed

Particles start vibrating in fixed positions

Particles change their state from solid to gas

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23. One disadvantage of using alcohol in a liquid-in-glass thermometer:

it has large expansivity

it has low freezing point (-112°C)

it wets the glass tube

its expansion is linear

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Ch 7 Thermal Properties of Matter Short Questions