Which of these contains only one polar covalent bond:
Correct answer: A. CH3F
- A. CH3F
- B. CH2F2
- C. CHI3
- D. CBr4
Explanation
The correct answer is CH3F. It contains one polar covalent bond between carbon and fluorine. Fluorine's high electronegativity compared to carbon leads to a significant dipole moment, making the bond polar. In contrast, CH2F2 has two polar covalent bonds due to the presence of two fluorine atoms. CHI3 has three polar covalent bonds, as each carbon-iodine bond is polar. CBr4 contains four polar covalent bonds between carbon and bromine, resulting in four dipoles.
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About Chemical Bonding
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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