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. _____ of crocus is natural thermometer.

Seed

Stem

Flower

Root

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

All

Small heat capacity

Uniform thermal expansion

Low freezing point

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

6 x 10 power -5 K-1

2.4 x 10 power -5 K-1

4.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

#4. 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-5 K(power) -1

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

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

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

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

ΔQ = mHf

ΔQ = mCf ΔT

ΔQ = mCf

ΔQ = CHf

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

J/gK

J/kg2K

J/kgK

KgK/J

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

920

470

387

903

#8. Specific heat of _____ is maximum.

Copper

Ice

Mercury

Water

#9. The specific heat of ice is:

2200 J/kgK

2100 J/kgK

2400 J/kgK

2300 J/kgK

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

β=3α

β=α/2

β=α

β=2α

#11. The boiling point of lead is:

1750 °C

1753 °C

1752 °C

1750 °C

#12. Unit of heat capacity is:

J/K

J/K2

JK2

JK

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

Copper

Ice

Mercury

Water

#14. Normal human body temperature is:

42°C

15°C

37°C

98.6°C

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

Low specific heat of water

Large specific heat of water

Less absorption of heat

Low temperature of water

#16. Mercury freezes at:

0°C

-39°C

-357°C

-100°C

#17. 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

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

Gold

Brass

Steel

Aluminium

#19. Specific heat of water is:

1760 J/kgK

800J/kgK

2500 J/kgK

4200 J/kgK

#20. Evaporation causes ______.

Coolness

Dryness

Warmness

Cloudiness

#21. Which of the following affects evaporation?

Wind

Temperature

Surface area of liquid

All

#22. Refrigerator is based on the principle of:

Light

Thermodynamics

Mechanics

Sound

#23. The boiling point of gold is:

2595°C

2777°C

2450°C

2660°C

#24. 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 -7 K

1.9 x 10 power -6 K

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

21000 J/K

0.0011 J/K

840 J/K

5 J/K

#26. Temperature of ice in freezer is:

0°C

-28°C

-15°C

-18°C

#27. The formula of specific heat is:

c = m ΔQ/Δt

c = ΔQ/Δt

c = ΔQ Δt/m

c = Δtm/ΔQ

#28. Water freezes at:

-273K

32°F

0K

0°F

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

26°C

24°C

25°C

27°C

#30. The boiling point of water is:

90°C

100°C

78°C

98°C

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

Heat

Heat capacity

Temperature

Thermal conductivity

#32. Unit of heat is:

Joule

Kelvin

Joule per second

Meter per second

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