Boiling point of HF is _ H2O.
Correct answer: A. Lower than
- A. Lower than
- B. Higher than
- C. Equal to
- D. Almost same as
Explanation
H2O have a greater boiling point than HF because H2O can form 4 hydrogen bond while HF has 2 hydrogen bond and to break all the hydrogen bonds more energy is needed by H2O than HF.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Hydrogen Bonding
Hydrogen bonding is the strong attraction between hydrogen attached to nitrogen, oxygen or fluorine and an electronegative atom in the same or another molecule. It explains unusual boiling points, viscosity, surface tension, water's properties and the difference between intermolecular and intramolecular hydrogen bonding.
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