Max boiling point is of:
Correct answer: C. Glucose
- A. Water
- B. Ammonia
- C. Glucose
- D. All
Explanation
The boiling point of a substance is determined by the intermolecular forces between the molecules of that substance.The glucose molecules in the aqueous solution forms about eleven (inter-and intra-molecular) hydrogen bonds. Water molecules have strong hydrogen bonds, which are the strongest type of intermolecular force.Water can form two hydrogen bonds per molecule, as it has two hydrogen atoms and two lone pairs on oxygen atom. Ammonia can form only one hydrogen bond per molecule as it has only one lone pair.So water exhibits stronger Hydrogen bonding. So the boiling point order will be : Glucose>Water>Ammonia 1500C 1000C -330C
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About Evaporation, Boiling Point and Vapour Pressure
Evaporation is the escape of higher-energy molecules from a liquid surface, while vapour pressure is the pressure exerted by vapour in equilibrium with that liquid. The topic distinguishes evaporation from boiling and relates both to temperature, intermolecular forces, surface area, atmospheric pressure and the boiling point.
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