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

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

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

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

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

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

T(k) = 373 + °C

T(k) = 273 + °C

T(k) = 273 + °F

T(k) = 373 - °C

#3. Refrigerator is based on the principle of:

Thermodynamics

Sound

Light

Mechanics

#4. Specific heat of water is:

1760 J/kgK

800J/kgK

4200 J/kgK

2500 J/kgK

#5. Unit of heat capacity is:

J/K2

J/K

JK

JK2

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

Large specific heat of water

Low specific heat of water

Less absorption of heat

Low temperature of water

#7. The boiling point of water is:

100°C

78°C

90°C

98°C

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

Mercury

Water

Copper

Ice

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

J/kg2K

KgK/J

J/gK

J/kgK

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

Heat

Temperature

Heat capacity

Thermal conductivity

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

920

387

903

470

#12. Water freezes at:

32°F

-273K

0K

0°F

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

β=3α

β=α/2

β=α

β=2α

#14. The specific heat of ice is:

2200 J/kgK

2300 J/kgK

2100 J/kgK

2400 J/kgK

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

1.9 x 10 power -6 K

1.9 x 10 power -7 K

1.9 x 10 power -5 K

1.9 x 10 power -8 K

#16. Mercury freezes at:

-39°C

0°C

-357°C

-100°C

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

Low freezing point

All

Small heat capacity

Uniform thermal expansion

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

0.0011 J/K

5 J/K

840 J/K

21000 J/K

#19. The boiling point of lead is:

1753 °C

1750 °C

1752 °C

1750 °C

#20. _____ of crocus is natural thermometer.

Seed

Flower

Root

Stem

#21. Evaporation causes ______.

Coolness

Warmness

Cloudiness

Dryness

#22. Normal human body temperature is:

42°C

15°C

98.6°C

37°C

#23. Which of the following affects evaporation?

All

Surface area of liquid

Wind

Temperature

#24. Temperature of ice in freezer is:

-15°C

-18°C

-28°C

0°C

#25. Specific heat of _____ is maximum.

Water

Ice

Copper

Mercury

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

25°C

26°C

27°C

24°C

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

ΔQ = mHf

ΔQ = CHf

ΔQ = mCf

ΔQ = mCf ΔT

#28. The boiling point of gold is:

2450°C

2777°C

2595°C

2660°C

#29. Unit of heat is:

Joule per second

Kelvin

Joule

Meter per second

#30. The formula of specific heat is:

c = Δtm/ΔQ

c = m ΔQ/Δt

c = ΔQ/Δt

c = ΔQ Δt/m

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

2.4 x 10 power -5 K-1

6 x 10 power -5 K-1

4.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

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

Brass

Steel

Aluminium

Gold

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