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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. The boiling point of gold is:

2595°C

2450°C

2660°C

2777°C

#2. Normal human body temperature is:

42°C

37°C

15°C

98.6°C

#3. The boiling point of lead is:

1750 °C

1753 °C

1752 °C

1750 °C

#4. Unit of heat capacity is:

JK

J/K

J/K2

JK2

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

7.2 x 10 power -5 K-1

6 x 10 power -5 K-1

4.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

#6. Unit of heat is:

Joule

Meter per second

Kelvin

Joule per second

#7. Which of the following affects evaporation?

Surface area of liquid

Wind

Temperature

All

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

β=2α

β=3α

β=α/2

β=α

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

All

Small heat capacity

Uniform thermal expansion

Low freezing point

#10. Mercury freezes at:

-357°C

-39°C

-100°C

0°C

#11. _____ of crocus is natural thermometer.

Flower

Seed

Stem

Root

#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?

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

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

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

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

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

Thermal conductivity

Heat

Temperature

Heat capacity

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

920

387

903

470

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

24°C

25°C

26°C

27°C

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

J/kg2K

J/kgK

J/gK

KgK/J

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

Low temperature of water

Less absorption of heat

Low specific heat of water

Large specific heat of water

#18. Evaporation causes ______.

Warmness

Cloudiness

Coolness

Dryness

#19. 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

#20. Refrigerator is based on the principle of:

Mechanics

Thermodynamics

Light

Sound

#21. The boiling point of water is:

90°C

100°C

98°C

78°C

#22. The formula of specific heat is:

c = ΔQ Δt/m

c = ΔQ/Δt

c = Δtm/ΔQ

c = m ΔQ/Δt

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

21000 J/K

0.0011 J/K

840 J/K

5 J/K

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

Gold

Steel

Aluminium

Brass

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

Mercury

Ice

Water

Copper

#26. The specific heat of ice is:

2300 J/kgK

2400 J/kgK

2200 J/kgK

2100 J/kgK

#27. Specific heat of _____ is maximum.

Water

Mercury

Copper

Ice

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

ΔQ = CHf

ΔQ = mCf

ΔQ = mCf ΔT

ΔQ = mHf

#29. Specific heat of water is:

4200 J/kgK

1760 J/kgK

800J/kgK

2500 J/kgK

#30. 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 -8 K

1.9 x 10 power -6 K

#31. Water freezes at:

32°F

0K

-273K

0°F

#32. Temperature of ice in freezer is:

-18°C

-28°C

-15°C

0°C

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