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. Specific heat of _____ is maximum.

Copper

Ice

Water

Mercury

#2. The boiling point of water is:

78°C

98°C

100°C

90°C

#3. _____ of crocus is natural thermometer.

Flower

Stem

Root

Seed

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

25°C

24°C

27°C

26°C

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

Small heat capacity

Low freezing point

All

Uniform thermal expansion

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

β=α/2

β=3α

β=α

β=2α

#7. Mercury freezes at:

-100°C

-39°C

-357°C

0°C

#8. Refrigerator is based on the principle of:

Mechanics

Light

Thermodynamics

Sound

#9. Unit of heat is:

Meter per second

Joule

Kelvin

Joule per second

#10. Normal human body temperature is:

98.6°C

15°C

42°C

37°C

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

ΔQ = mCf

ΔQ = CHf

ΔQ = mCf ΔT

ΔQ = mHf

#12. The boiling point of gold is:

2595°C

2660°C

2777°C

2450°C

#13. 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

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

387

903

470

920

#15. Specific heat of water is:

4200 J/kgK

1760 J/kgK

800J/kgK

2500 J/kgK

#16. Unit of heat capacity is:

J/K

J/K2

JK

JK2

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

J/kgK

J/kg2K

J/gK

KgK/J

#18. Water freezes at:

0°F

0K

-273K

32°F

#19. Temperature of ice in freezer is:

0°C

-28°C

-18°C

-15°C

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

Ice

Mercury

Copper

Water

#21. The formula of specific heat is:

c = Δtm/ΔQ

c = ΔQ Δt/m

c = m ΔQ/Δt

c = ΔQ/Δt

#22. Which of the following affects evaporation?

Surface area of liquid

Temperature

All

Wind

#23. 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-15 K(power) -1

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

#24. The specific heat of ice is:

2400 J/kgK

2100 J/kgK

2200 J/kgK

2300 J/kgK

#25. The boiling point of lead is:

1753 °C

1750 °C

1750 °C

1752 °C

#26. 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 -6 K

1.9 x 10 power -5 K

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

T(k) = 373 + °C

T(k) = 373 - °C

T(k) = 273 + °C

T(k) = 273 + °F

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

Heat capacity

Heat

Temperature

Thermal conductivity

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

Aluminium

Steel

Gold

Brass

#30. 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

#31. Evaporation causes ______.

Warmness

Dryness

Coolness

Cloudiness

#32. 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

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