Question # 1

Crocus flower open when the temperature is:

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23 ^oC

26^oC

29^oC

32^oC

The unit of rate of conduction :

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JS^-1

J

K

JK^-1

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

Expansion in one meter steel is:

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1.0 mm

0.1 mm

1.0 mm

1.3 mm

Density of water in kgm^-3 is:

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1000

4200

4300

4500

Bimetal strip is made up of two different metal:

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Copper & iron

Brass & Iron

Brass & Nickel

Copper & Nickel

In symbols, co-efficient of volume expansion is defined as

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β = ΔT/V∘ΔV

β = ΔV/ΔT

β = ΔV/V∘ΔT

β = ΔT/ΔV

The sum of kinetic energy and potential energy of molecules or atoms is called.

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Temperature

Internal energy

Kinetic energy

Potential energy

The formula of heat capacity is:

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mc

mc𝜟𝜽

mc𝜟Q/𝜟T

None of these

Which of the following do not effect evaporation?

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Temperature

Wind

Volume

Surface area of liquid

Which process produced cooling effect?

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boiling

freezing

condensation

evaporation

From following in which device thermostat is used:

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Electroscope

Electric Bell

Electric Iron

Radio

Water freezes at

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0oF

32oF

273 K

0 K

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9th Class Physics Chapter 8 Thermal Properties of Matter English Medium KPK Boards Online Mcqs MCQs With Answers

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