Which of the following substances exhibits hydrogen bonding?
Correct answer: C. NH3
- A. H2S
- B. SiH4
- C. NH3
- D. HI
Explanation
Hydrogen bonding occurs in those substances in which a highly electronegative atom (such as Fluorine (F), Oxygen (O) or Nitrogen (N)) is directly bonded to Hydrogen. The presence of one of these three atoms is a REQUIREMENT for hydrogen bonding to occur. Only option C mentions a substance which has one of these three atoms, i.e. Nitrogen in NH3, while the other options mention other atoms aside from the three highly electronegative species mentioned previously.
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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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