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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 specific heat of ice is:

2400 J/kgK

2100 J/kgK

2300 J/kgK

2200 J/kgK

#2. Specific heat of _____ is maximum.

Copper

Water

Ice

Mercury

#3. The boiling point of water is:

100°C

98°C

78°C

90°C

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

Heat

Temperature

Heat capacity

Thermal conductivity

#5. Normal human body temperature is:

37°C

15°C

98.6°C

42°C

#6. Unit of heat is:

Joule

Meter per second

Kelvin

Joule per second

#7. Specific heat of water is:

800J/kgK

2500 J/kgK

4200 J/kgK

1760 J/kgK

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

J/kgK

J/kg2K

KgK/J

J/gK

#9. The formula of specific heat is:

c = Δtm/ΔQ

c = ΔQ Δt/m

c = m ΔQ/Δt

c = ΔQ/Δt

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

25°C

27°C

26°C

24°C

#11. Refrigerator is based on the principle of:

Sound

Thermodynamics

Light

Mechanics

#12. The boiling point of gold is:

2777°C

2450°C

2660°C

2595°C

#13. Which of the following affects evaporation?

Surface area of liquid

Temperature

All

Wind

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

Steel

Aluminium

Brass

Gold

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

840 J/K

5 J/K

0.0011 J/K

21000 J/K

#16. The boiling point of lead is:

1753 °C

1752 °C

1750 °C

1750 °C

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

2.4 x 10 power -5 K-1

7.2 x 10 power -5 K-1

4.2 x 10 power -5 K-1

6 x 10 power -5 K-1

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

β=α/2

β=3α

β=α

β=2α

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

ΔQ = mHf

ΔQ = mCf ΔT

ΔQ = CHf

ΔQ = mCf

#20. Mercury freezes at:

-357°C

0°C

-39°C

-100°C

#21. 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

#22. 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

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

Ice

Copper

Water

Mercury

#24. Water freezes at:

0°F

-273K

0K

32°F

#25. _____ of crocus is natural thermometer.

Root

Flower

Seed

Stem

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

Low freezing point

Small heat capacity

Uniform thermal expansion

All

#27. 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

#28. Temperature of ice in freezer is:

-18°C

0°C

-15°C

-28°C

#29. Unit of heat capacity is:

J/K2

J/K

JK2

JK

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

1.9 x 10 power -7 K

1.9 x 10 power -6 K

1.9 x 10 power -5 K

1.9 x 10 power -8 K

#31. Evaporation causes ______.

Cloudiness

Warmness

Dryness

Coolness

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

470

903

920

387

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