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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. Mercury freezes at:

-357°C

0°C

-39°C

-100°C

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

Low freezing point

Small heat capacity

Uniform thermal expansion

All

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

Less absorption of heat

Low specific heat of water

Low temperature of water

Large specific heat of water

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

6 x 10 power -5 K-1

4.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

7.2 x 10 power -5 K-1

#5. The specific heat of ice is:

2400 J/kgK

2200 J/kgK

2300 J/kgK

2100 J/kgK

#6. _____ of crocus is natural thermometer.

Seed

Flower

Root

Stem

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

J/kgK

J/gK

J/kg2K

KgK/J

#8. 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

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

β=α/2

β=α

β=3α

β=2α

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

5 J/K

21000 J/K

840 J/K

0.0011 J/K

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

ΔQ = mCf ΔT

ΔQ = mCf

ΔQ = mHf

ΔQ = CHf

#12. Specific heat of _____ is maximum.

Copper

Mercury

Ice

Water

#13. The formula of specific heat is:

c = ΔQ/Δt

c = m ΔQ/Δt

c = ΔQ Δt/m

c = Δtm/ΔQ

#14. Unit of heat capacity is:

JK2

JK

J/K2

J/K

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

Mercury

Ice

Water

Copper

#16. Refrigerator is based on the principle of:

Thermodynamics

Light

Mechanics

Sound

#17. The boiling point of lead is:

1752 °C

1750 °C

1750 °C

1753 °C

#18. Unit of heat is:

Joule

Kelvin

Joule per second

Meter per second

#19. Specific heat of water is:

4200 J/kgK

1760 J/kgK

2500 J/kgK

800J/kgK

#20. Normal human body temperature is:

37°C

42°C

98.6°C

15°C

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

Gold

Steel

Brass

Aluminium

#22. Which of the following affects evaporation?

All

Wind

Surface area of liquid

Temperature

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

27°C

24°C

25°C

26°C

#24. The boiling point of gold is:

2595°C

2450°C

2777°C

2660°C

#25. Water freezes at:

0K

0°F

32°F

-273K

#26. Temperature of ice in freezer is:

0°C

-28°C

-15°C

-18°C

#27. What will be the value of β for a solid for which α has a value of 2 x 10power-5 K(power) -1?

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

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

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

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

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

T(k) = 273 + °C

T(k) = 273 + °F

T(k) = 373 - °C

T(k) = 373 + °C

#29. Evaporation causes ______.

Dryness

Coolness

Cloudiness

Warmness

#30. The boiling point of water is:

78°C

90°C

100°C

98°C

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

Temperature

Heat

Thermal conductivity

Heat capacity

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

903

387

920

470

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