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Al-Huda Science Academy has designed Physics Chapter 8 Class 9 MCQs for board preparation. Most of the questions are from the previous board papers. These are helping material for all type of students. Must share to your fellows if helpful.

Time allocated to each question is 20 seconds.

Physics Chapter 8 Class 9 MCQs

 

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#1. Refrigerator is based on the principle of:

Light

Mechanics

Sound

Thermodynamics

#2. Which of the following material has large value of temperature coefficient of linear expansion?

Gold

Aluminium

Steel

Brass

#3. The formula of conversion from Celsius to Kelvin scale is:

T(k) = 373 + °C

T(k) = 273 + °F

T(k) = 273 + °C

T(k) = 373 - °C

#4. The value of coefficient of linear thermal expansion of brass is:

1.9 x 10 power -8 K

1.9 x 10 power -7 K

1.9 x 10 power -5 K

1.9 x 10 power -6 K

#5. The value of specific heat of silver in J/kgK is:

387

470

903

920

#6. Which of the following material has large heat capacity:

Mercury

Copper

Ice

Water

#7. Heat capacity of 5kg of water having specific heat equals to 4200 J/kgK is:

5 J/K

840 J/K

21000 J/K

0.0011 J/K

#8. The formula of specific heat is:

c = ΔQ/Δt

c = Δtm/ΔQ

c = ΔQ Δt/m

c = m ΔQ/Δt

#9. A large water reservoir keeps the temperature of nearby land moderate due to:

Low specific heat of water

Large specific heat of water

Low temperature of water

Less absorption of heat

#10. Mercury is used as thermometric material because it has:

Uniform thermal expansion

Small heat capacity

All

Low freezing point

#11. Unit of heat capacity is:

J/K2

JK2

J/K

JK

#12. The boiling point of water is:

100°C

90°C

78°C

98°C

#13. The boiling point of gold is:

2777°C

2595°C

2660°C

2450°C

#14. The boiling point of lead is:

1750 °C

1753 °C

1752 °C

1750 °C

#15. Temperature of ice in freezer is:

-15°C

-28°C

-18°C

0°C

#16. Specific heat of _____ is maximum.

Copper

Water

Ice

Mercury

#17. Normal human body temperature is:

98.6°C

15°C

42°C

37°C

#18. Specific heat of water is:

4200 J/kgK

1760 J/kgK

800J/kgK

2500 J/kgK

#19. Mercury freezes at:

-100°C

0°C

-39°C

-357°C

#20. Degree of hotness or coldness of the body is called:

Temperature

Heat capacity

Thermal conductivity

Heat

#21. Which of the following affects evaporation?

Temperature

Surface area of liquid

Wind

All

#22. Water freezes at:

0°F

-273K

0K

32°F

#23. The formula of latent heat of fusion is:

ΔQ = mCf ΔT

ΔQ = mCf

ΔQ = mHf

ΔQ = CHf

#24. S.I. unit of specific heat is:

J/kgK

KgK/J

J/gK

J/kg2K

#25. _____ of crocus is natural thermometer.

Stem

Seed

Flower

Root

#26. The coefficient of volume thermal expansion of aluminium is:

2.4 x 10 power -5 K-1

6 x 10 power -5 K-1

7.2 x 10 power -5 K-1

4.2 x 10 power -5 K-1

#27. The specific heat of ice is:

2400 J/kgK

2300 J/kgK

2200 J/kgK

2100 J/kgK

#28. Unit of heat is:

Meter per second

Joule per second

Kelvin

Joule

#29. What will be the value of β for a solid for which α has a value of 2 x 10power-5 K(power) -1?

2 x 10power-5 K(power) -1

6 x 10power-5 K(power) -1

2 x 10power-15 K(power) -1

8 x 10power-5 K(power) -1

#30. On Celsius scale, the temperature 300K will be:

27°C

25°C

24°C

26°C

#31. The coefficient of linear expansion and volume expansion are related by the equation:

β=α/2

β=3α

β=2α

β=α

#32. Evaporation causes ______.

Coolness

Warmness

Dryness

Cloudiness

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