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

Less absorption of heat

Low specific heat of water

Large specific heat of water

Low temperature of water

#2. _____ of crocus is natural thermometer.

Flower

Root

Seed

Stem

#3. The formula of specific heat is:

c = m ΔQ/Δt

c = Δtm/ΔQ

c = ΔQ/Δt

c = ΔQ Δt/m

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

4.2 x 10 power -5 K-1

6 x 10 power -5 K-1

2.4 x 10 power -5 K-1

7.2 x 10 power -5 K-1

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

25°C

26°C

27°C

24°C

#6. The specific heat of ice is:

2300 J/kgK

2200 J/kgK

2100 J/kgK

2400 J/kgK

#7. Evaporation causes ______.

Cloudiness

Dryness

Warmness

Coolness

#8. 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

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

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

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

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

21000 J/K

5 J/K

0.0011 J/K

840 J/K

#10. Temperature of ice in freezer is:

-18°C

0°C

-15°C

-28°C

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

Small heat capacity

Low freezing point

All

Uniform thermal expansion

#12. Which of the following affects evaporation?

Temperature

All

Wind

Surface area of liquid

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

KgK/J

J/kgK

J/gK

J/kg2K

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

1.9 x 10 power -6 K

1.9 x 10 power -5 K

1.9 x 10 power -8 K

1.9 x 10 power -7 K

#15. Unit of heat capacity is:

J/K

J/K2

JK2

JK

#16. The boiling point of gold is:

2595°C

2660°C

2777°C

2450°C

#17. Mercury freezes at:

0°C

-357°C

-39°C

-100°C

#18. Normal human body temperature is:

42°C

98.6°C

15°C

37°C

#19. The boiling point of lead is:

1753 °C

1750 °C

1752 °C

1750 °C

#20. Unit of heat is:

Meter per second

Kelvin

Joule per second

Joule

#21. Refrigerator is based on the principle of:

Mechanics

Light

Sound

Thermodynamics

#22. Specific heat of _____ is maximum.

Ice

Mercury

Water

Copper

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

Temperature

Heat

Heat capacity

Thermal conductivity

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

Aluminium

Gold

Steel

Brass

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

387

470

920

903

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

Water

Ice

Copper

Mercury

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

ΔQ = CHf

ΔQ = mCf ΔT

ΔQ = mHf

ΔQ = mCf

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

β=α/2

β=3α

β=α

β=2α

#29. The boiling point of water is:

100°C

78°C

98°C

90°C

#30. Water freezes at:

-273K

32°F

0K

0°F

#31. Specific heat of water is:

800J/kgK

4200 J/kgK

1760 J/kgK

2500 J/kgK

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

T(k) = 273 + °F

T(k) = 373 + °C

T(k) = 273 + °C

T(k) = 373 - °C

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