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 boiling point of lead is:

1750 °C

1750 °C

1753 °C

1752 °C

#2. _____ of crocus is natural thermometer.

Root

Flower

Stem

Seed

#3. 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 -7 K

1.9 x 10 power -8 K

#4. Water freezes at:

0K

32°F

0°F

-273K

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

25°C

27°C

26°C

24°C

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

T(k) = 373 + °C

T(k) = 273 + °C

T(k) = 273 + °F

T(k) = 373 - °C

#7. The boiling point of gold is:

2660°C

2777°C

2595°C

2450°C

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

Thermal conductivity

Temperature

Heat

Heat capacity

#9. The boiling point of water is:

78°C

98°C

90°C

100°C

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

β=α/2

β=2α

β=3α

β=α

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

All

Small heat capacity

Low freezing point

Uniform thermal expansion

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

21000 J/K

840 J/K

0.0011 J/K

5 J/K

#13. 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

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

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

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

#14. Temperature of ice in freezer is:

-28°C

-15°C

-18°C

0°C

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

J/kg2K

J/kgK

KgK/J

J/gK

#16. Specific heat of _____ is maximum.

Copper

Mercury

Ice

Water

#17. Specific heat of water is:

1760 J/kgK

2500 J/kgK

800J/kgK

4200 J/kgK

#18. Unit of heat is:

Meter per second

Joule

Kelvin

Joule per second

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

4.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

7.2 x 10 power -5 K-1

6 x 10 power -5 K-1

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

920

470

387

903

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

Gold

Brass

Aluminium

Steel

#22. Evaporation causes ______.

Warmness

Coolness

Cloudiness

Dryness

#23. The specific heat of ice is:

2300 J/kgK

2200 J/kgK

2100 J/kgK

2400 J/kgK

#24. Normal human body temperature is:

15°C

42°C

98.6°C

37°C

#25. Unit of heat capacity is:

J/K

J/K2

JK2

JK

#26. The formula of specific heat is:

c = ΔQ/Δt

c = m ΔQ/Δt

c = Δtm/ΔQ

c = ΔQ Δt/m

#27. Refrigerator is based on the principle of:

Mechanics

Sound

Light

Thermodynamics

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

ΔQ = CHf

ΔQ = mHf

ΔQ = mCf

ΔQ = mCf ΔT

#29. Which of the following affects evaporation?

Surface area of liquid

Wind

All

Temperature

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

Mercury

Copper

Water

Ice

#31. Mercury freezes at:

-39°C

-357°C

0°C

-100°C

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

Less absorption of heat

Low temperature of water

Large specific heat of water

Low specific heat of water

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