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

Less absorption of heat

Less absorption of heat

Low specific heat of water

Low specific heat of water

Low temperature of water

Low temperature of water

Large specific heat of water

Large specific heat of water

#2. The specific heat of ice is:

2100 J/kgK

2100 J/kgK

2200 J/kgK

2200 J/kgK

2400 J/kgK

2400 J/kgK

2300 J/kgK

2300 J/kgK

#3. Evaporation causes ______.

Cloudiness

Cloudiness

Warmness

Warmness

Coolness

Coolness

Dryness

Dryness

#4. The boiling point of lead is:

1752 °C

1752 °C

1750 °C

1750 °C

1753 °C

1753 °C

1750 °C

1750 °C

#5. Unit of heat capacity is:

J/K2

J/K2

JK2

JK2

JK

JK

J/K

J/K

#6. Unit of heat is:

Joule

Joule

Joule per second

Joule per second

Meter per second

Meter per second

Kelvin

Kelvin

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

J/kg2K

J/kg2K

J/gK

J/gK

J/kgK

J/kgK

KgK/J

KgK/J

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

24°C

24°C

25°C

25°C

27°C

27°C

26°C

26°C

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

Water

Water

Ice

Ice

Mercury

Mercury

Copper

Copper

#10. The boiling point of water is:

78°C

78°C

98°C

98°C

90°C

90°C

100°C

100°C

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

β=3α

β=3α

β=2α

β=2α

β=α

β=α

β=α/2

β=α/2

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

Steel

Steel

Gold

Gold

Brass

Brass

Aluminium

Aluminium

#13. The boiling point of gold is:

2777°C

2777°C

2595°C

2595°C

2660°C

2660°C

2450°C

2450°C

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

T(k) = 273 + °C

T(k) = 273 + °C

T(k) = 273 + °F

T(k) = 273 + °F

T(k) = 373 - °C

T(k) = 373 - °C

T(k) = 373 + °C

T(k) = 373 + °C

#15. Temperature of ice in freezer is:

-15°C

-15°C

-28°C

-28°C

-18°C

-18°C

0°C

0°C

#16. Mercury freezes at:

-39°C

-39°C

-357°C

-357°C

0°C

0°C

-100°C

-100°C

#17. Water freezes at:

0K

0K

-273K

-273K

32°F

32°F

0°F

0°F

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

840 J/K

840 J/K

5 J/K

5 J/K

21000 J/K

21000 J/K

0.0011 J/K

0.0011 J/K

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

ΔQ = mCf ΔT

ΔQ = mCf ΔT

ΔQ = CHf

ΔQ = CHf

ΔQ = mHf

ΔQ = mHf

ΔQ = mCf

ΔQ = mCf

#20. The formula of specific heat is:

c = ΔQ Δt/m

c = ΔQ Δt/m

c = m ΔQ/Δt

c = m ΔQ/Δt

c = Δtm/ΔQ

c = Δtm/ΔQ

c = ΔQ/Δt

c = ΔQ/Δt

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

6 x 10 power -5 K-1

6 x 10 power -5 K-1

4.2 x 10 power -5 K-1

4.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

2.4 x 10 power -5 K-1

7.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

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

Small heat capacity

Small heat capacity

Low freezing point

Low freezing point

Uniform thermal expansion

Uniform thermal expansion

All

All

#23. Specific heat of water is:

2500 J/kgK

2500 J/kgK

800J/kgK

800J/kgK

4200 J/kgK

4200 J/kgK

1760 J/kgK

1760 J/kgK

#24. Normal human body temperature is:

15°C

15°C

42°C

42°C

98.6°C

98.6°C

37°C

37°C

#25. Specific heat of _____ is maximum.

Mercury

Mercury

Water

Water

Ice

Ice

Copper

Copper

#26. _____ of crocus is natural thermometer.

Root

Root

Flower

Flower

Seed

Seed

Stem

Stem

#27. Which of the following affects evaporation?

Wind

Wind

Surface area of liquid

Surface area of liquid

Temperature

Temperature

All

All

#28. 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

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

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

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

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

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

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

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

#29. Refrigerator is based on the principle of:

Thermodynamics

Thermodynamics

Mechanics

Mechanics

Sound

Sound

Light

Light

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

1.9 x 10 power -5 K

1.9 x 10 power -5 K

1.9 x 10 power -7 K

1.9 x 10 power -7 K

1.9 x 10 power -6 K

1.9 x 10 power -6 K

1.9 x 10 power -8 K

1.9 x 10 power -8 K

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

903

903

470

470

387

387

920

920

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

Thermal conductivity

Thermal conductivity

Temperature

Temperature

Heat capacity

Heat capacity

Heat

Heat

Finish