Shapes of simple molecules and ions Quiz
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5 questions, one answer each
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1. What is the shape of the ammonium ion, NH₄⁺?
- A. Pyramidal
- B. Tetrahedral
- C. Square planar
- D. Trigonal planar
2. Which molecule has a bond angle of about 104.5°?
- A. CH₄
- B. NH₃
- C. BF₃
- D. H₂O
3. Why is the H–N–H angle in NH₃ smaller than in CH₄?
- A. The lone pair repels bonding pairs more strongly than they repel each other
- B. Nitrogen is more electronegative than carbon
- C. Nitrogen has fewer protons
- D. The N–H bond is longer than the C–H bond
4. What shape is XeF₄, which has four bonding pairs and two lone pairs on xenon?
- A. Tetrahedral
- B. Octahedral
- C. Square planar
- D. See-saw
5. Which species has bond angles of both 90° and 120°?
- A. SF₆
- B. PCl₅
- C. BF₃
- D. CH₄