Vapour pressure of water at 100°C is___________________?
Vapour pressure of water at 100°C is___________________?
A. 55 mm Hg
B. 760 mm Hg
C. 355 mm Hg
D. 1489 mm Hg
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If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?
If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?A. Heat of transition
B. Heat of fusion
C. Enthalpy change
D. All of aboveThe conversion of vapours back into their liquid state is called__________________?
The conversion of vapours back into their liquid state is called__________________?A. crystallization
B. evaporization
C. vaporization
D. condensationThe phenomenon in which a compound exists in two or more crystalline forms is called ________________?
The phenomenon in which a compound exists in two or more crystalline forms is called ________________?A. Isomorphism
B. Polymorphism
C. Anisotropy
D. AllotropyThe amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is_____________________?
The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is_____________________?A. Molar heat of sublimation
B. Molar heat of fusion
C. Molar heat of vapourization
D. Latent heat of that liquidThe density of water may be__________________?
The density of water may be__________________?A. Equal to that of ice
B. Greater than that of ice
C. Less than that of ice
D. All are possibleFormation of vapours from the surface of a liquid is called________________?
Formation of vapours from the surface of a liquid is called________________?A. vapourization
B. evaporation
C. condensation
D. cracking