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10th Science - Heat
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The constant temperature at which the ice convert into water is called the the ------------ of ice.
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2 points
Melting point
Latent heat of vaporization
latent heat of fusion
Boiling point
The latent heat of vaporization of water is ----
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2 points
500 cal/g
54 cal/g
80 cal/g
540 cal/g
The latent heat of fusion of ice is----
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2 points
540 cal/g
80 cal/g
800 cal/g
4 cal/g
The mass of vapour present in a unit volume of air is called ------
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2 points
Relative humidity
Humidity
Absolute humidity
None of these
At 4° C , the volume of water is----
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2 points
None of these
Equal to density
Maximum
Minimum
Which of the following substance contracts on heating ?
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2 points
Lake warm water
Ice
Iron
Mercury
The vapour content in the year is measured by -----
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2 points
Relative humidity
Dew point
Absolute humidity
None of these
Humid and dry nature of air depends on the the----
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2 points
Amount of vapour in the air
Amount of vapour to make the air saturated
Temperature of the air
Volume of the air
Vapours in air condenses to form ----
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2 points
fog
Snowfall
rainfall
Snowfall and rainfall
When the temperature of water decreases below 4 ° C its volume......
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2 points
Decreases
Increases
Remains same
None of these
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