Physics Chapter 8 Class 9 MCQs Online Test

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 formula of latent heat of fusion is:

ΔQ = mCf ΔT

ΔQ = mCf

ΔQ = mHf

ΔQ = CHf

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

Uniform thermal expansion

Small heat capacity

All

Low freezing point

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

T(k) = 273 + °C

T(k) = 373 + °C

T(k) = 273 + °F

T(k) = 373 - °C

#4. Unit of heat is:

Kelvin

Joule

Meter per second

Joule per second

#5. The boiling point of gold is:

2595°C

2777°C

2660°C

2450°C

#6. The boiling point of lead is:

1750 °C

1753 °C

1752 °C

1750 °C

#7. Temperature of ice in freezer is:

-15°C

0°C

-18°C

-28°C

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

Ice

Mercury

Copper

Water

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

1.9 x 10 power -8 K

1.9 x 10 power -5 K

1.9 x 10 power -6 K

1.9 x 10 power -7 K

#10. Evaporation causes ______.

Warmness

Coolness

Cloudiness

Dryness

#11. _____ of crocus is natural thermometer.

Seed

Root

Stem

Flower

#12. The boiling point of water is:

78°C

100°C

98°C

90°C

#13. Water freezes at:

-273K

0°F

32°F

#14. Specific heat of water is:

1760 J/kgK

4200 J/kgK

2500 J/kgK

800J/kgK

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

Large specific heat of water

Less absorption of heat

Low temperature of water

Low specific heat of water

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

Thermal conductivity

Heat

Temperature

Heat capacity

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

24°C

26°C

27°C

25°C

#18. Mercury freezes at:

-357°C

0°C

-100°C

-39°C

#19. Specific heat of _____ is maximum.

Water

Ice

Mercury

Copper

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

21000 J/K

840 J/K

5 J/K

0.0011 J/K

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

Brass

Gold

Aluminium

Steel

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

4.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

6 x 10 power -5 K-1

2.4 x 10 power -5 K-1

#23. Unit of heat capacity is:

JK2

J/K2

J/K

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

387

903

470

920

#25. Normal human body temperature is:

15°C

98.6°C

42°C

37°C

#26. Which of the following affects evaporation?

Temperature

Surface area of liquid

Wind

All

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

β=3α

β=α

β=2α

β=α/2

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

J/kg2K

J/kgK

J/gK

KgK/J

#29. The specific heat of ice is:

2400 J/kgK

2100 J/kgK

2300 J/kgK

2200 J/kgK

#30. The formula of specific heat is:

c = Δtm/ΔQ

c = m ΔQ/Δt

c = ΔQ Δt/m

c = ΔQ/Δt

#31. 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

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

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

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

#32. Refrigerator is based on the principle of:

Thermodynamics

Mechanics

Light

Sound

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