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

21000 J/K

5 J/K

840 J/K

0.0011 J/K

#2. _____ of crocus is natural thermometer.

Root

Flower

Stem

Seed

#3. The formula of specific heat is:

c = ΔQ Δt/m

c = m ΔQ/Δt

c = Δtm/ΔQ

c = ΔQ/Δt

#4. The boiling point of lead is:

1750 °C

1753 °C

1752 °C

1750 °C

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

T(k) = 273 + °F

T(k) = 373 + °C

T(k) = 373 - °C

T(k) = 273 + °C

#6. Unit of heat capacity is:

JK

JK2

J/K

J/K2

#7. Temperature of ice in freezer is:

-18°C

-15°C

-28°C

0°C

#8. The specific heat of ice is:

2100 J/kgK

2200 J/kgK

2400 J/kgK

2300 J/kgK

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

Small heat capacity

Low freezing point

Uniform thermal expansion

All

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

27°C

24°C

25°C

26°C

#11. Normal human body temperature is:

42°C

37°C

98.6°C

15°C

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

ΔQ = mCf ΔT

ΔQ = CHf

ΔQ = mHf

ΔQ = mCf

#13. Specific heat of _____ is maximum.

Mercury

Copper

Ice

Water

#14. 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-15 K(power) -1

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

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

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

470

903

920

387

#16. Evaporation causes ______.

Coolness

Warmness

Cloudiness

Dryness

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

Gold

Brass

Aluminium

Steel

#18. Unit of heat is:

Joule

Kelvin

Meter per second

Joule per second

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

Heat capacity

Heat

Temperature

Thermal conductivity

#20. The boiling point of gold is:

2660°C

2450°C

2777°C

2595°C

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

Large specific heat of water

Low specific heat of water

Less absorption of heat

Low temperature of water

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

Copper

Water

Mercury

Ice

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

6 x 10 power -5 K-1

4.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

#24. Refrigerator is based on the principle of:

Mechanics

Sound

Thermodynamics

Light

#25. The boiling point of water is:

78°C

100°C

90°C

98°C

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

β=2α

β=α

β=3α

β=α/2

#27. Specific heat of water is:

2500 J/kgK

1760 J/kgK

800J/kgK

4200 J/kgK

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

J/kg2K

KgK/J

J/gK

J/kgK

#29. Mercury freezes at:

-357°C

0°C

-100°C

-39°C

#30. 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

#31. Water freezes at:

0°F

0K

-273K

32°F

#32. Which of the following affects evaporation?

Surface area of liquid

All

Wind

Temperature

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