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1. What is the molecular geometry of a molecule with four
bonded atoms and one lone pair around the central atom?
A) Tetrahedral
B) Trigonal pyramidal
C) Trigonal planar
D) Bent
Answer: B) Trigonal pyramidal
Rationale: The lone pair occupies more space than a
bonded pair, so it pushes the bonded atoms closer together,
resulting in a trigonal pyramidal shape.
2. What is the bond angle of a molecule with a linear
molecular geometry?
A) 90°
B) 109.5°
C) 120°
D) 180°
Answer: D) 180°
Rationale: A linear molecule has two bonded atoms and no
lone pairs around the central atom, so the bonded atoms are
as far apart as possible, resulting in a 180° bond angle.
3. What is the hybridization of the central atom in a
molecule with a trigonal bipyramidal molecular geometry?
A) sp
B) sp2
C) sp3
D) sp3d
Answer: D) sp3d
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