Hydrogen bonding in H − F is stronger than H2O and NH3. The highest boiling point among the three is of:
Correct answer: C. H2O
- A. HF
- B. NH3
- C. H2O
- D. All have equal boiling points
Explanation
Each water molecule has two hydrogen atoms. Whereas, each HF molecule has only one hydrogen atom. And hence, water molecule takes part in extensive and more hydrogen bonding than Hydrofluoric acid. Water molecule through their extensive hydrogen bonding forms bulky molecule and it is very difficult to break their bonds. A large amount of energy is required to break all its bonds. Thus H2O has a higher boiling point than HF.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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