Shapes of molecules and ions

Shapes of molecules and ions Quiz

Spec 3C · Edexcel International A Level Chemistry: Quiz

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5 questions, one answer each

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  1. 1. What is the shape of a BCl₃ molecule?

    • A. Trigonal pyramidal
    • B. Trigonal planar
    • C. Tetrahedral
    • D. Linear

  2. 2. What is the F–S–F bond angle in SF₆?

    • A. 109.5°
    • B. 120°
    • C. 90°
    • D. 107°

  3. 3. Why is the H–O–H angle in water smaller than 109.5°?

    • A. Oxygen is smaller than carbon
    • B. Water has two lone pairs, which repel the bonding pairs more strongly than bonding pairs repel each other
    • C. The O–H bond is ionic
    • D. Hydrogen atoms repel each other more strongly than lone pairs do

  4. 4. Which species is NOT tetrahedral?

    • A. CH₄
    • B. NH₄⁺
    • C. BF₄⁻
    • D. NH₃

  5. 5. Phosphine, PH₃, is analogous to NH₃. Predict its shape and approximate H–P–H bond angle.

    • A. Trigonal planar, 120°
    • B. Tetrahedral, 109.5°
    • C. Trigonal pyramidal, about 107°
    • D. Bent, about 104.5°

Quiz