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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:

2300 J/kgK

2200 J/kgK

2100 J/kgK

2400 J/kgK

#2. 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

#3. Temperature of ice in freezer is:

0°C

-15°C

-28°C

-18°C

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

903

470

387

920

#5. Mercury freezes at:

-357°C

-100°C

-39°C

0°C

#6. 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-5 K(power) -1

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

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

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

21000 J/K

5 J/K

840 J/K

0.0011 J/K

#8. Refrigerator is based on the principle of:

Mechanics

Thermodynamics

Light

Sound

#9. Water freezes at:

0K

-273K

32°F

0°F

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

T(k) = 273 + °F

T(k) = 273 + °C

T(k) = 373 - °C

T(k) = 373 + °C

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

Ice

Copper

Water

Mercury

#12. 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

#13. The boiling point of water is:

98°C

90°C

100°C

78°C

#14. Normal human body temperature is:

15°C

42°C

98.6°C

37°C

#15. Evaporation causes ______.

Coolness

Cloudiness

Warmness

Dryness

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

β=3α

β=α

β=2α

β=α/2

#17. The boiling point of lead is:

1753 °C

1750 °C

1752 °C

1750 °C

#18. The formula of specific heat is:

c = m ΔQ/Δt

c = ΔQ/Δt

c = ΔQ Δt/m

c = Δtm/ΔQ

#19. _____ of crocus is natural thermometer.

Root

Stem

Seed

Flower

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

All

Low freezing point

Uniform thermal expansion

Small heat capacity

#21. Unit of heat is:

Joule

Meter per second

Joule per second

Kelvin

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

J/gK

J/kg2K

J/kgK

KgK/J

#23. The boiling point of gold is:

2777°C

2660°C

2450°C

2595°C

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

Heat capacity

Thermal conductivity

Heat

Temperature

#25. Which of the following affects evaporation?

Surface area of liquid

All

Temperature

Wind

#26. Specific heat of _____ is maximum.

Water

Copper

Ice

Mercury

#27. Unit of heat capacity is:

JK2

J/K

J/K2

JK

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

Steel

Aluminium

Brass

Gold

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

1.9 x 10 power -5 K

1.9 x 10 power -6 K

1.9 x 10 power -7 K

1.9 x 10 power -8 K

#30. Specific heat of water is:

1760 J/kgK

4200 J/kgK

800J/kgK

2500 J/kgK

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

26°C

27°C

24°C

25°C

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

ΔQ = CHf

ΔQ = mCf ΔT

ΔQ = mHf

ΔQ = mCf

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