Thermal Properties of Matter
Heat energy require to change unit mass of a substance from solid to liquid state at its melting point without change in its temperature is called its
latent heat of vaporization
latent heat of energy
latent heat of fusion
latent heat of pressure
latent heat of fusion
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The temperature at which a solid starts melting is called itsA. constant point
B. boiling point
C. freezing point
D. melting point
On the Kelvin scale, the interval between the lower and upper fixed points is divided into
A. 100 equal parts
B. 180 equal parts
C. 50 equal parts
D. 90 equal parts
Latent heat of vaporization is
A. 3.36 ร 106ย Jkg-1
B. 4.36 ร 106ย Jkg-1
C. 2.26 ร 106ย Jkg-1
D. 1.36 ร 106ย Jkg-1
More molecules of a liquid move with high velocities at
A. pressure
B. zero temperature
C. lower temperature
D. higher temperature
The matter which has no definite shape of its own is
A. liquid
B. solid
C. semi solid
D. gas
The expansion of the volume of a liquid taking into consideration the expansion of the container also is called its
A. zero volume expansion
B. constant volume expansion
C. apparent volume expansion
D. real volume expansion
Wires on electric poles are given some sag on order to prevent
A. expansion in winters
B. contraction in winters
C. touching with each other
D. from coming in way of air planes
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