10 questions🇬🇧English
🔺 Shapes of Molecules – A-level
Chemistry · A-level — VSEPR theory, naming molecular shapes and predicting bond angles from electron pairs
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Questions
What is the shape of a carbon dioxide (CO₂) molecule?
Bent
Trigonal planar
Tetrahedral
Linear
20s
What is the H–C–H bond angle in a methane (CH₄) molecule?
107°
104.5°
120°
109.5°
20s
Boron trifluoride (BF₃) has three bonding pairs and no lone pairs on boron. What is its shape?
Tetrahedral
Trigonal planar
Bent
Trigonal pyramidal
20s
What is the H–N–H bond angle in an ammonia (NH₃) molecule?
109.5°
107°
104.5°
120°
20s
According to electron pair repulsion theory, which type of repulsion is the strongest?
All repulsions are equal
Lone pair–bond pair
Lone pair–lone pair
Bond pair–bond pair
20s
Which correctly gives the shape and bond angle of a water (H₂O) molecule?
Linear, 180°
Bent, 104.5°
Bent, 107°
Trigonal pyramidal, 104.5°
30s
Sulfur hexafluoride (SF₆) has six bonding pairs around sulfur. What are its shape and bond angle?
Hexagonal planar, 60°
Octahedral, 109.5°
Octahedral, 90°
Trigonal bipyramidal, 120°
30s
Phosphorus pentachloride (PCl₅) has five bonding pairs and no lone pairs on phosphorus. What is its shape?
Octahedral
Square pyramidal
Trigonal bipyramidal
Pentagonal planar
30s
What is the H–N–H bond angle in the ammonium ion, NH₄⁺?
104.5°
109.5°
90°
107°
30s
What are the shape and approximate bond angle of the amide ion, NH₂⁻?
Bent, 120°
Trigonal pyramidal, 107°
Linear, 180°
Bent, 104.5°
30s