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Last Updated on June 17, 2021 by Ahsa.Pk

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

Brass

Steel

Aluminium

Gold

#2. The boiling point of water is:

78°C

100°C

90°C

98°C

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

ΔQ = mCf ΔT

ΔQ = mCf

ΔQ = mHf

ΔQ = CHf

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

Thermal conductivity

Temperature

Heat

Heat capacity

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

β=3α

β=2α

β=α

β=α/2

#6. The boiling point of gold is:

2450°C

2660°C

2777°C

2595°C

#7. Unit of heat capacity is:

J/K

JK2

J/K2

JK

#8. Water freezes at:

0K

0°F

32°F

-273K

#9. Refrigerator is based on the principle of:

Thermodynamics

Mechanics

Light

Sound

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

26°C

25°C

24°C

27°C

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

0.0011 J/K

840 J/K

21000 J/K

5 J/K

#12. 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

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

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

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

#13. The formula of specific heat is:

c = m ΔQ/Δt

c = ΔQ/Δt

c = Δtm/ΔQ

c = ΔQ Δt/m

#14. _____ of crocus is natural thermometer.

Stem

Flower

Root

Seed

#15. Specific heat of water is:

1760 J/kgK

4200 J/kgK

2500 J/kgK

800J/kgK

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

470

387

903

920

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

J/gK

J/kgK

J/kg2K

KgK/J

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

Ice

Water

Copper

Mercury

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

Uniform thermal expansion

All

Small heat capacity

Low freezing point

#20. Mercury freezes at:

0°C

-100°C

-39°C

-357°C

#21. The boiling point of lead is:

1750 °C

1752 °C

1750 °C

1753 °C

#22. Which of the following affects evaporation?

All

Wind

Surface area of liquid

Temperature

#23. Specific heat of _____ is maximum.

Copper

Mercury

Water

Ice

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

7.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

4.2 x 10 power -5 K-1

6 x 10 power -5 K-1

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

T(k) = 273 + °C

T(k) = 373 + °C

T(k) = 373 - °C

T(k) = 273 + °F

#26. Evaporation causes ______.

Cloudiness

Coolness

Dryness

Warmness

#27. Unit of heat is:

Joule

Meter per second

Kelvin

Joule per second

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

1.9 x 10 power -5 K

1.9 x 10 power -8 K

1.9 x 10 power -7 K

1.9 x 10 power -6 K

#29. The specific heat of ice is:

2400 J/kgK

2100 J/kgK

2300 J/kgK

2200 J/kgK

#30. Temperature of ice in freezer is:

0°C

-28°C

-15°C

-18°C

#31. Normal human body temperature is:

15°C

37°C

42°C

98.6°C

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

Large specific heat of water

Less absorption of heat

Low specific heat of water

Low temperature of water

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