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MHT CET202519 Apr 2025Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Which of the following molecules has a regular geometry as expected?

Options

  1. ASiCl ₄
  2. BSF ₄
  3. CBrF ₅
  4. DXeF ₄

Correct answer

A. SiCl ₄

Step-by-step solution

A molecule exhibits a regular geometry when its molecular geometry aligns precisely with its electron geometry, which typically requires no lone pairs on the central atom. Applying VSEPR theory to the given options reveals the following. For SiC l₄ , silicon has a steric number of 4 (4 bonding pairs, 0 lone pairs), yielding a tetrahedral electron and molecular geometry—a regular arrangement. In SF₄ , sulfur has a steric number of 5 (4 bonding pairs, 1 lone pair), resulting in a see-saw molecular geometry that disto

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