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 thermometer uses voltage to measure temperature of a hot body?

Gas thermometer

Liquid in glass thermometer

Thermocouple

Resistance thermometer

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

Resistance thermometer

Thermocouple

Constant volume gas thermometer

Liquid in glass thermometer

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

Expand linearly

Is a bad conductor

Is colourless

Wets glass

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4. How do the molecules in a solid behave?

Move in a straight line from hot to cold ends

Move randomly

Rotate and vibrate randomly at their own positions

Vibrate about their mean position

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5. Heat is the:

the energy in transit

total kinetic energy of the molecules

work done by the molecules

the internal energy

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

Use a longer capillary tube

Using long specific its

Use a bigger bulb which contains more amount of liquids

Changes colour on temperature

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

+273

32

zero

-273

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

Cannot be determined

Remains the same

Increases

Decreases

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

gives a large change for a given temperature rise

can measure a large range of temperature

can read the maximum temperature

quickly responds to temperature changes

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

Particles start vibrating in fixed positions

Particles move farther apart

Particles become more closely packed

Particles change their state from solid to gas

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

Light energy

Chemical energy of the bonds between the particles

Potential energy of the particles

Kinetic energy of the particles

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

Mercury-in-glass clinical thermometer

Mercury-in-glass laboratory thermometer

Alcohol-in-glass thermometer

Thermocouple thermometer

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13. Temperature of substance is:

degree of hotness or coldness

the total amount of heat contained in it

the total number of molecules in it

dependent upon the intermolecular distance

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14. Gases and liquids are categorized as:

Gases

Liquids

Solids

Fluids

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

+45

-40

-45

+40

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

Rotatory motion

Vibratory motion

Linear motion

Random motion

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

Plasma

Gas

Liquids

Solid

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18. Which Statement describes the particles structure of gases?

particles have moderate kinetic energy and move randomly

particles are arranged in a repeating pattern

particles are tightly packed and have strong bonds

Particles have fixed positions and low kinetic energy

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19. 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?

0.04cm

1.00cm

0.08cm

0.06cm

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

it has low freezing point (-112°C)

it wets the glass tube

it has large expansivity

its expansion is linear

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

Plasma

Gas

Liquid

Solid

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22. How many phases of matter are there?

4

1

3

2

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

a bad conductor of heat

colourless

non-linear expansion

a low boiling point (100°C)

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Ch 7 Thermal Properties of Matter Short Questions