Choose the Same Point Group Molecules

GUJARAT SET 2025

Which one of the following pairs have the same point group?

• (A) NH₃, PCl₃
• (B) BF₃, PCl₃
• (C) CO₂, SO₂
• (D) CH₄, XeF₄

Correct Answer: (A) NH₃, PCl₃

Both NH₃ and PCl₃ have a trigonal pyramidal geometry with one lone pair, belonging to the C_3v point group.

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Other options:

B: BF₃ is D_3h (trigonal planar), while PCl₃ is C_3v.

C: CO₂ is D_∞h (linear), while SO₂ is C_2v (bent).

D: CH₄ is T_d (tetrahedral), while XeF₄ is D_4h (square planar).