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 aboveHydrogen bonding is involved in____________________?
Hydrogen bonding is involved in____________________?A. Solubility
B. Cleansing action of detergents
C. Biological molecules
D. AllWhen substance moves from a solid to a liquid state all of the following changes occur except__________________?
When substance moves from a solid to a liquid state all of the following changes occur except__________________?A. Molecules become more disordered
B. K.E of the molecules decreases
C. Intermolecular forces become weaker
D. Molecule become further separatedMolar heat of vaporization of water is_________________?
Molar heat of vaporization of water is_________________?A. 40.7 KJ/mole
B. 40.7 J/mole
C. 40.7 cal/mole
D. 40.7 Kcal/moleWhen the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?
When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called_________________?A. ABAB (hexagonal)
B. ABCABC (Cubic)
C. Orthor hombic
D. RhombohedralThe 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. Allotropy