NEET 2016 Phase 1 · ChemistryVSEPR shapePrevious Year Question
Predict the correct order among the following (repulsion between electron pairs as per VSEPR theory):
Answer: (A) Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair. \textbf{Answer:} (A) Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair \textbf{Solution:} The VSEPR repulsion order is lp–lp > lp–bp > bp–bp, because lone pairs are localized closer to the nucleus and repel more strongly than bonding pairs.
- A.Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair✓
- B.Lone pair–lone pair > bond pair–bond pair > lone pair–bond pair
- C.Bond pair–bond pair > lone pair–bond pair > lone pair–lone pair
- D.Lone pair–bond pair > bond pair–bond pair > lone pair–lone pair
Correct Answer
(A) Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair
Solution & Explanation
\textbf{Answer:} (A) Lone pair–lone pair > lone pair–bond pair > bond pair–bond pair \textbf{Solution:} The VSEPR repulsion order is lp–lp > lp–bp > bp–bp, because lone pairs are localized closer to the nucleus and repel more strongly than bonding pairs.
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