Shapes of molecules and ions Quiz
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5 questions, one answer each
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1. What is the shape and bond angle of SF₆?
- A. Tetrahedral, 109.5°
- B. Octahedral, 90°
- C. Trigonal bipyramidal, 120°
- D. Square planar, 90°
2. Which species is linear?
- A. H₂O
- B. NH₄⁺
- C. BCl₃
- D. CO₂
3. Why is the H–N–H bond angle in NH₃ about 107° rather than 109.5°?
- A. The lone pair repels the bonding pairs more strongly than they repel each other
- B. Nitrogen has a larger nucleus than carbon
- C. There are only three bonding pairs, so they repel less
- D. The N–H bond is polar
4. What is the shape of the NH₄⁺ ion?
- A. Pyramidal, 107°
- B. Bent, 104.5°
- C. Tetrahedral, 109.5°
- D. Trigonal planar, 120°
5. What is the shape of XeF₄?
- A. Tetrahedral
- B. Square planar
- C. See-saw
- D. Octahedral