Which of the following shows zero dipole moment:
Correct answer: A. CH4
- A. CH4
- B. NH3
- C. HF
- D. H2O
Explanation
CH4 (methane) is a tetrahedral molecule with four identical C-H bonds. The C-H bonds are polar, but the individual dipole moments cancel each other out because they are arranged in a symmetrical tetrahedral shape.
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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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