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.

Mercury

Ice

Water

Copper

#2. The boiling point of water is:

100°C

98°C

90°C

78°C

#3. 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

#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?

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

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

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

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

#5. Mercury freezes at:

-39°C

-357°C

-100°C

0°C

#6. Specific heat of water is:

1760 J/kgK

2500 J/kgK

4200 J/kgK

800J/kgK

#7. 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

#8. Temperature of ice in freezer is:

-28°C

0°C

-18°C

-15°C

#9. Refrigerator is based on the principle of:

Light

Mechanics

Thermodynamics

Sound

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

Heat

Heat capacity

Thermal conductivity

Temperature

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

ΔQ = mHf

ΔQ = mCf ΔT

ΔQ = CHf

ΔQ = mCf

#12. 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

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

β=α/2

β=3α

β=α

β=2α

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

Water

Mercury

Copper

Ice

#15. The boiling point of gold is:

2595°C

2777°C

2450°C

2660°C

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

Gold

Aluminium

Brass

Steel

#17. The specific heat of ice is:

2200 J/kgK

2300 J/kgK

2100 J/kgK

2400 J/kgK

#18. Unit of heat capacity is:

J/K

JK

JK2

J/K2

#19. Normal human body temperature is:

42°C

37°C

98.6°C

15°C

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

903

920

387

470

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

J/gK

KgK/J

J/kgK

J/kg2K

#22. The boiling point of lead is:

1753 °C

1752 °C

1750 °C

1750 °C

#23. Unit of heat is:

Meter per second

Kelvin

Joule per second

Joule

#24. _____ of crocus is natural thermometer.

Seed

Stem

Root

Flower

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

Low temperature of water

Low specific heat of water

Large specific heat of water

Less absorption of heat

#26. Evaporation causes ______.

Warmness

Coolness

Cloudiness

Dryness

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

0.0011 J/K

840 J/K

5 J/K

21000 J/K

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

Uniform thermal expansion

Small heat capacity

All

Low freezing point

#29. Which of the following affects evaporation?

Wind

Temperature

All

Surface area of liquid

#30. Water freezes at:

32°F

-273K

0K

0°F

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

24°C

25°C

27°C

26°C

#32. The formula of specific heat is:

c = ΔQ Δt/m

c = ΔQ/Δt

c = Δtm/ΔQ

c = m ΔQ/Δt

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