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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?

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

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

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

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

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

6 x 10 power -5 K-1

7.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

4.2 x 10 power -5 K-1

#3. The boiling point of water is:

98°C

90°C

100°C

78°C

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

5 J/K

0.0011 J/K

21000 J/K

840 J/K

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

Heat

Thermal conductivity

Temperature

Heat capacity

#6. Water freezes at:

-273K

32°F

0°F

0K

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

J/kgK

J/gK

KgK/J

J/kg2K

#8. The specific heat of ice is:

2200 J/kgK

2400 J/kgK

2100 J/kgK

2300 J/kgK

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

ΔQ = mCf ΔT

ΔQ = mCf

ΔQ = CHf

ΔQ = mHf

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

Ice

Copper

Water

Mercury

#11. Mercury freezes at:

-100°C

0°C

-39°C

-357°C

#12. Specific heat of water is:

2500 J/kgK

800J/kgK

1760 J/kgK

4200 J/kgK

#13. Which of the following affects evaporation?

Surface area of liquid

Wind

Temperature

All

#14. _____ of crocus is natural thermometer.

Seed

Root

Stem

Flower

#15. The boiling point of lead is:

1750 °C

1750 °C

1753 °C

1752 °C

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

β=α

β=3α

β=2α

β=α/2

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

Low temperature of water

Large specific heat of water

Less absorption of heat

Low specific heat of water

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

25°C

26°C

24°C

27°C

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

Gold

Brass

Aluminium

Steel

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

Uniform thermal expansion

Small heat capacity

All

Low freezing point

#21. Refrigerator is based on the principle of:

Mechanics

Sound

Light

Thermodynamics

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

920

387

903

470

#23. Evaporation causes ______.

Dryness

Cloudiness

Coolness

Warmness

#24. Unit of heat capacity is:

JK2

J/K

J/K2

JK

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

T(k) = 273 + °F

T(k) = 373 + °C

T(k) = 373 - °C

T(k) = 273 + °C

#26. Temperature of ice in freezer is:

-18°C

-15°C

0°C

-28°C

#27. The formula of specific heat is:

c = ΔQ Δt/m

c = ΔQ/Δt

c = m ΔQ/Δt

c = Δtm/ΔQ

#28. The boiling point of gold is:

2777°C

2595°C

2450°C

2660°C

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

1.9 x 10 power -5 K

1.9 x 10 power -7 K

1.9 x 10 power -6 K

1.9 x 10 power -8 K

#30. Specific heat of _____ is maximum.

Copper

Water

Mercury

Ice

#31. Normal human body temperature is:

37°C

98.6°C

42°C

15°C

#32. Unit of heat is:

Joule

Kelvin

Joule per second

Meter per second

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