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.

Ice

Mercury

Water

Copper

#2. The boiling point of water is:

90°C

78°C

100°C

98°C

#3. The formula of specific heat is:

c = m ΔQ/Δt

c = ΔQ/Δt

c = Δtm/ΔQ

c = ΔQ Δt/m

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

Less absorption of heat

Large specific heat of water

Low specific heat of water

Low temperature of water

#5. Normal human body temperature is:

37°C

42°C

15°C

98.6°C

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

7.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

6 x 10 power -5 K-1

4.2 x 10 power -5 K-1

#7. 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

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

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

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

#8. Mercury freezes at:

-39°C

0°C

-100°C

-357°C

#9. The boiling point of gold is:

2777°C

2595°C

2450°C

2660°C

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

Mercury

Copper

Water

Ice

#11. _____ of crocus is natural thermometer.

Seed

Root

Flower

Stem

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

ΔQ = mCf

ΔQ = mHf

ΔQ = CHf

ΔQ = mCf ΔT

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

β=α/2

β=α

β=2α

β=3α

#14. The specific heat of ice is:

2400 J/kgK

2300 J/kgK

2100 J/kgK

2200 J/kgK

#15. Refrigerator is based on the principle of:

Thermodynamics

Sound

Light

Mechanics

#16. Specific heat of water is:

1760 J/kgK

4200 J/kgK

800J/kgK

2500 J/kgK

#17. The boiling point of lead is:

1753 °C

1752 °C

1750 °C

1750 °C

#18. Unit of heat is:

Joule

Joule per second

Kelvin

Meter per second

#19. Evaporation causes ______.

Warmness

Dryness

Cloudiness

Coolness

#20. Unit of heat capacity is:

JK2

JK

J/K

J/K2

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

Brass

Aluminium

Steel

Gold

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

387

470

920

903

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

Heat

Temperature

Thermal conductivity

Heat capacity

#24. 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

#25. Water freezes at:

0K

-273K

32°F

0°F

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

KgK/J

J/gK

J/kgK

J/kg2K

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

1.9 x 10 power -8 K

1.9 x 10 power -6 K

1.9 x 10 power -5 K

1.9 x 10 power -7 K

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

27°C

26°C

25°C

24°C

#29. Temperature of ice in freezer is:

0°C

-15°C

-18°C

-28°C

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

Small heat capacity

Uniform thermal expansion

Low freezing point

All

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

0.0011 J/K

21000 J/K

5 J/K

840 J/K

#32. Which of the following affects evaporation?

Surface area of liquid

Wind

All

Temperature

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