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

T(k) = 373 - °C

T(k) = 273 + °F

T(k) = 373 + °C

T(k) = 273 + °C

#2. Specific heat of _____ is maximum.

Water

Copper

Mercury

Ice

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

Less absorption of heat

Large specific heat of water

Low temperature of water

Low specific heat of water

#4. Refrigerator is based on the principle of:

Thermodynamics

Mechanics

Sound

Light

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

1.9 x 10 power -8 K

1.9 x 10 power -7 K

1.9 x 10 power -5 K

1.9 x 10 power -6 K

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

Temperature

Thermal conductivity

Heat

Heat capacity

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

903

920

470

387

#8. Unit of heat is:

Joule

Kelvin

Joule per second

Meter per second

#9. Specific heat of water is:

2500 J/kgK

4200 J/kgK

1760 J/kgK

800J/kgK

#10. The specific heat of ice is:

2200 J/kgK

2300 J/kgK

2100 J/kgK

2400 J/kgK

#11. Evaporation causes ______.

Cloudiness

Warmness

Dryness

Coolness

#12. _____ of crocus is natural thermometer.

Stem

Seed

Root

Flower

#13. Temperature of ice in freezer is:

0°C

-15°C

-18°C

-28°C

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

26°C

24°C

25°C

27°C

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

Low freezing point

All

Uniform thermal expansion

Small heat capacity

#16. 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

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

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

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

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

ΔQ = CHf

ΔQ = mCf

ΔQ = mCf ΔT

ΔQ = mHf

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

2.4 x 10 power -5 K-1

4.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

6 x 10 power -5 K-1

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

Brass

Steel

Gold

Aluminium

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

0.0011 J/K

5 J/K

21000 J/K

840 J/K

#21. Normal human body temperature is:

37°C

98.6°C

15°C

42°C

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

J/kgK

J/gK

KgK/J

J/kg2K

#23. Mercury freezes at:

0°C

-357°C

-100°C

-39°C

#24. Which of the following affects evaporation?

Wind

Temperature

Surface area of liquid

All

#25. Water freezes at:

0°F

0K

-273K

32°F

#26. The boiling point of water is:

78°C

100°C

98°C

90°C

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

β=2α

β=3α

β=α

β=α/2

#28. Unit of heat capacity is:

JK

J/K

JK2

J/K2

#29. The formula of specific heat is:

c = ΔQ Δt/m

c = Δtm/ΔQ

c = ΔQ/Δt

c = m ΔQ/Δt

#30. The boiling point of lead is:

1753 °C

1750 °C

1750 °C

1752 °C

#31. The boiling point of gold is:

2777°C

2660°C

2595°C

2450°C

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

Mercury

Copper

Water

Ice

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