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 formula of latent heat of fusion is:

ΔQ = mCf

ΔQ = mCf

ΔQ = CHf

ΔQ = CHf

ΔQ = mCf ΔT

ΔQ = mCf ΔT

ΔQ = mHf

ΔQ = mHf

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

903

903

387

387

470

470

920

920

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

Aluminium

Aluminium

Steel

Steel

Brass

Brass

Gold

Gold

#4. Refrigerator is based on the principle of:

Mechanics

Mechanics

Sound

Sound

Thermodynamics

Thermodynamics

Light

Light

#5. The boiling point of gold is:

2660°C

2660°C

2450°C

2450°C

2777°C

2777°C

2595°C

2595°C

#6. Specific heat of _____ is maximum.

Ice

Ice

Mercury

Mercury

Copper

Copper

Water

Water

#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?

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

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

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

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

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

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

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

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

#8. Specific heat of water is:

4200 J/kgK

4200 J/kgK

2500 J/kgK

2500 J/kgK

800J/kgK

800J/kgK

1760 J/kgK

1760 J/kgK

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

24°C

24°C

26°C

26°C

27°C

27°C

25°C

25°C

#10. Unit of heat capacity is:

J/K2

J/K2

JK2

JK2

J/K

J/K

JK

JK

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

T(k) = 273 + °F

T(k) = 273 + °F

T(k) = 373 - °C

T(k) = 373 - °C

T(k) = 373 + °C

T(k) = 373 + °C

T(k) = 273 + °C

T(k) = 273 + °C

#12. _____ of crocus is natural thermometer.

Flower

Flower

Seed

Seed

Root

Root

Stem

Stem

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

6 x 10 power -5 K-1

6 x 10 power -5 K-1

7.2 x 10 power -5 K-1

7.2 x 10 power -5 K-1

2.4 x 10 power -5 K-1

2.4 x 10 power -5 K-1

4.2 x 10 power -5 K-1

4.2 x 10 power -5 K-1

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

J/kgK

J/kgK

J/gK

J/gK

J/kg2K

J/kg2K

KgK/J

KgK/J

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

Water

Water

Mercury

Mercury

Ice

Ice

Copper

Copper

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

1.9 x 10 power -8 K

1.9 x 10 power -8 K

1.9 x 10 power -5 K

1.9 x 10 power -5 K

1.9 x 10 power -6 K

1.9 x 10 power -6 K

1.9 x 10 power -7 K

1.9 x 10 power -7 K

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

Heat capacity

Heat capacity

Thermal conductivity

Thermal conductivity

Temperature

Temperature

Heat

Heat

#18. Temperature of ice in freezer is:

-15°C

-15°C

-18°C

-18°C

-28°C

-28°C

0°C

0°C

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

β=3α

β=3α

β=2α

β=2α

β=α/2

β=α/2

β=α

β=α

#20. Evaporation causes ______.

Coolness

Coolness

Dryness

Dryness

Cloudiness

Cloudiness

Warmness

Warmness

#21. Normal human body temperature is:

42°C

42°C

98.6°C

98.6°C

37°C

37°C

15°C

15°C

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

Low freezing point

Low freezing point

Small heat capacity

Small heat capacity

All

All

Uniform thermal expansion

Uniform thermal expansion

#23. The boiling point of lead is:

1750 °C

1750 °C

1750 °C

1750 °C

1753 °C

1753 °C

1752 °C

1752 °C

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

5 J/K

5 J/K

21000 J/K

21000 J/K

0.0011 J/K

0.0011 J/K

840 J/K

840 J/K

#25. The specific heat of ice is:

2300 J/kgK

2300 J/kgK

2400 J/kgK

2400 J/kgK

2200 J/kgK

2200 J/kgK

2100 J/kgK

2100 J/kgK

#26. Which of the following affects evaporation?

Temperature

Temperature

Wind

Wind

All

All

Surface area of liquid

Surface area of liquid

#27. Water freezes at:

0K

0K

32°F

32°F

-273K

-273K

0°F

0°F

#28. Mercury freezes at:

0°C

0°C

-357°C

-357°C

-39°C

-39°C

-100°C

-100°C

#29. Unit of heat is:

Joule

Joule

Meter per second

Meter per second

Joule per second

Joule per second

Kelvin

Kelvin

#30. The boiling point of water is:

90°C

90°C

78°C

78°C

100°C

100°C

98°C

98°C

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

Large specific heat of water

Large specific heat of water

Low specific heat of water

Low specific heat of water

Less absorption of heat

Less absorption of heat

Low temperature of water

Low temperature of water

#32. The formula of specific heat is:

c = Δtm/ΔQ

c = Δtm/ΔQ

c = ΔQ Δt/m

c = ΔQ Δt/m

c = m ΔQ/Δt

c = m ΔQ/Δt

c = ΔQ/Δt

c = ΔQ/Δt

Finish