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.

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Physics Chapter 8 Class 9 MCQs

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

903

903

920

920

470

470

387

387

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

ΔQ = mHf

ΔQ = mHf

ΔQ = mCf

ΔQ = mCf

ΔQ = mCf ΔT

ΔQ = mCf ΔT

ΔQ = CHf

ΔQ = CHf

#3. Specific heat of water is:

1760 J/kgK

1760 J/kgK

800J/kgK

800J/kgK

2500 J/kgK

2500 J/kgK

4200 J/kgK

4200 J/kgK

#4. Which of the following affects evaporation?

Wind

Wind

All

All

Temperature

Temperature

Surface area of liquid

Surface area of liquid

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

Large specific heat of water

Large specific heat of water

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

#6. Normal human body temperature is:

15°C

15°C

42°C

42°C

37°C

37°C

98.6°C

98.6°C

#7. Temperature of ice in freezer is:

-15°C

-15°C

-28°C

-28°C

0°C

0°C

-18°C

-18°C

#8. _____ of crocus is natural thermometer.

Flower

Flower

Root

Root

Seed

Seed

Stem

Stem

#9. The boiling point of lead is:

1750 °C

1750 °C

1750 °C

1750 °C

1753 °C

1753 °C

1752 °C

1752 °C

#10. Unit of heat is:

Kelvin

Kelvin

Meter per second

Meter per second

Joule per second

Joule per second

Joule

Joule

#11. Water freezes at:

-273K

-273K

32°F

32°F

0K

0K

0°F

0°F

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

840 J/K

840 J/K

0.0011 J/K

0.0011 J/K

21000 J/K

21000 J/K

5 J/K

5 J/K

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

26°C

26°C

25°C

25°C

27°C

27°C

24°C

24°C

#14. The boiling point of water is:

98°C

98°C

100°C

100°C

90°C

90°C

78°C

78°C

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

Small heat capacity

Small heat capacity

All

All

Uniform thermal expansion

Uniform thermal expansion

Low freezing point

Low freezing point

#16. 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

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

Brass

Brass

Steel

Steel

Gold

Gold

Aluminium

Aluminium

#18. 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-5 K(power) -1

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

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

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

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

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

#19. Evaporation causes ______.

Cloudiness

Cloudiness

Warmness

Warmness

Coolness

Coolness

Dryness

Dryness

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

J/kgK

J/kgK

J/gK

J/gK

KgK/J

KgK/J

J/kg2K

J/kg2K

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

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

4.2 x 10 power -5 K-1

4.2 x 10 power -5 K-1

6 x 10 power -5 K-1

6 x 10 power -5 K-1

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

β=3α

β=3α

β=α/2

β=α/2

β=α

β=α

β=2α

β=2α

#23. Specific heat of _____ is maximum.

Copper

Copper

Ice

Ice

Mercury

Mercury

Water

Water

#24. Unit of heat capacity is:

J/K2

J/K2

JK

JK

JK2

JK2

J/K

J/K

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

T(k) = 373 - °C

T(k) = 373 - °C

T(k) = 273 + °F

T(k) = 273 + °F

T(k) = 373 + °C

T(k) = 373 + °C

T(k) = 273 + °C

T(k) = 273 + °C

#26. Mercury freezes at:

-357°C

-357°C

0°C

0°C

-100°C

-100°C

-39°C

-39°C

#27. Refrigerator is based on the principle of:

Sound

Sound

Light

Light

Thermodynamics

Thermodynamics

Mechanics

Mechanics

#28. The boiling point of gold is:

2777°C

2777°C

2660°C

2660°C

2450°C

2450°C

2595°C

2595°C

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

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

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

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

Heat capacity

Heat capacity

Thermal conductivity

Thermal conductivity

Temperature

Temperature

Heat

Heat

#31. 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

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

Water

Water

Ice

Ice

Copper

Copper

Mercury

Mercury

Finish

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