Class 10 Science Heat chapter MCQ Part 2
1) __________ is the phenomenon in which the ice melts to the water below 0°C on the application of pressure and refreezes back to ice on the removal of pressure.
A) Latent heat
B) Humidity
C) Specific heat of capacity
D) Regelation
2) __________ if the pressure decreased then melting point is get.
A) lower
B) higher
C) remain same
D) none of the above
3) Glacier acts as a source of a river due to.......
A) latent heat
B) humidity
C) anomalous behavior of water
D) regelation
4) Fill the blank space with correct option : the melting point of the ice becomes lower than .........°C due to the applied pressure. This implies that at ...........°C ice is converted into water and as soon as the pressure is removed the melting point is restored back to .........°C and the water is converted back to ice again.
A) 1
B) 100
C) 0
D) 50
5 ) Water contract on increasing its temperature above
A) 0 to 4
B) 4 to 10
C) 100
D) 50
6) The presence of water vapor in the air makes it moist. The moisture in the atmosphere is called
A) Fog
B) Rain
C) Humidity
D) All of the above
7) When the air contains maximum possible water vapor, it is said to be
A)saturated with vapor at that temperature
B)unsaturated with vapor at that temperature
C)humidity
D) none of the above
Ans : 1) D 2)B 3)D 4)C 5) A 6) D 7) A
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