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NEET CHEMISTRYChemical Bonding and Molecular StructureEasy

Question

Mark the correct order of repulsion among the following according to the VSEPR theory.

A

lone pair-lone pair > bond pair-bond pair > lone pair-bond pair

B

bond pair-bond pair > lone pair-bond pair > lone pair-lone pair

C

lone pair-bond pair > bond pair-bond pair > lone pair-lone pair

D

lone pair-lone pair > lone pair-bond pair > bond pair-bond pair

Step-by-Step Solution

  1. Postulate of VSEPR Theory: The Valence Shell Electron Pair Repulsion (VSEPR) theory states that electron pairs surrounding the central atom repel one another and move as far apart as possible to minimize repulsion .
  2. Difference in Electron Pairs: While lone pairs are localised on the central atom, each bonded pair is shared between two atoms. Consequently, lone pair electrons occupy more space than bonding pair electrons .
  3. Order of Repulsion: Due to the spatial difference, the repulsion is greatest between two lone pairs and least between two bond pairs. The decreasing order of repulsive interaction is: Lone pair (lp) - Lone pair (lp)>Lone pair (lp) - Bond pair (bp)>Bond pair (bp) - Bond pair (bp)\text{Lone pair (lp) - Lone pair (lp)} > \text{Lone pair (lp) - Bond pair (bp)} > \text{Bond pair (bp) - Bond pair (bp)} .

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Chemical Bonding and Molecular Structure. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYChemical Bonding and Molecular Structurecorrectrepulsionfollowingaccordingtheory

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