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

Heat

Heat

Thermal conductivity

Thermal conductivity

Heat capacity

Heat capacity

Temperature

Temperature

#2. The boiling point of water is:

90°C

90°C

98°C

98°C

78°C

78°C

100°C

100°C

#3. The boiling point of gold is:

2595°C

2595°C

2660°C

2660°C

2450°C

2450°C

2777°C

2777°C

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

Low freezing point

Low freezing point

Small heat capacity

Small heat capacity

Uniform thermal expansion

Uniform thermal expansion

All

All

#5. Unit of heat capacity is:

JK2

JK2

J/K2

J/K2

JK

JK

J/K

J/K

#6. Mercury freezes at:

-100°C

-100°C

0°C

0°C

-39°C

-39°C

-357°C

-357°C

#7. The formula of specific heat is:

c = ΔQ Δt/m

c = ΔQ Δt/m

c = ΔQ/Δt

c = ΔQ/Δt

c = Δtm/ΔQ

c = Δtm/ΔQ

c = m ΔQ/Δt

c = m ΔQ/Δt

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

27°C

27°C

25°C

25°C

26°C

26°C

24°C

24°C

#9. Unit of heat is:

Joule per second

Joule per second

Meter per second

Meter per second

Kelvin

Kelvin

Joule

Joule

#10. Temperature of ice in freezer is:

0°C

0°C

-18°C

-18°C

-28°C

-28°C

-15°C

-15°C

#11. _____ of crocus is natural thermometer.

Seed

Seed

Stem

Stem

Flower

Flower

Root

Root

#12. Which of the following affects evaporation?

Surface area of liquid

Surface area of liquid

Temperature

Temperature

All

All

Wind

Wind

#13. Specific heat of water is:

800J/kgK

800J/kgK

1760 J/kgK

1760 J/kgK

2500 J/kgK

2500 J/kgK

4200 J/kgK

4200 J/kgK

#14. Evaporation causes ______.

Warmness

Warmness

Dryness

Dryness

Coolness

Coolness

Cloudiness

Cloudiness

#15. Water freezes at:

32°F

32°F

0°F

0°F

-273K

-273K

0K

0K

#16. Refrigerator is based on the principle of:

Light

Light

Thermodynamics

Thermodynamics

Sound

Sound

Mechanics

Mechanics

#17. 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

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

5 J/K

5 J/K

0.0011 J/K

0.0011 J/K

840 J/K

840 J/K

21000 J/K

21000 J/K

#19. 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 -5 K

1.9 x 10 power -5 K

1.9 x 10 power -8 K

1.9 x 10 power -8 K

1.9 x 10 power -7 K

1.9 x 10 power -7 K

#20. 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-5 K(power) -1

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

#21. 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

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

J/gK

J/gK

J/kg2K

J/kg2K

J/kgK

J/kgK

KgK/J

KgK/J

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

Mercury

Mercury

Water

Water

Copper

Copper

Ice

Ice

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

Gold

Gold

Steel

Steel

Aluminium

Aluminium

Brass

Brass

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

903

903

470

470

920

920

387

387

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

T(k) = 273 + °C

T(k) = 273 + °C

T(k) = 373 - °C

T(k) = 373 - °C

T(k) = 373 + °C

T(k) = 373 + °C

T(k) = 273 + °F

T(k) = 273 + °F

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

ΔQ = CHf

ΔQ = CHf

ΔQ = mCf

ΔQ = mCf

ΔQ = mCf ΔT

ΔQ = mCf ΔT

ΔQ = mHf

ΔQ = mHf

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

Low temperature of water

Low temperature of water

Low specific heat of water

Low specific heat of water

Large specific heat of water

Large specific heat of water

Less absorption of heat

Less absorption of heat

#29. The specific heat of ice is:

2300 J/kgK

2300 J/kgK

2400 J/kgK

2400 J/kgK

2100 J/kgK

2100 J/kgK

2200 J/kgK

2200 J/kgK

#30. The boiling point of lead is:

1750 °C

1750 °C

1753 °C

1753 °C

1750 °C

1750 °C

1752 °C

1752 °C

#31. Normal human body temperature is:

42°C

42°C

37°C

37°C

15°C

15°C

98.6°C

98.6°C

#32. Specific heat of _____ is maximum.

Copper

Copper

Water

Water

Mercury

Mercury

Ice

Ice

Finish