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Question: Answered & Verified by Expert
In which of the following changes there is no change in hybridisation of the central atom?
ChemistryChemical Bonding and Molecular StructureTS EAMCETTS EAMCET 2023 (14 May Shift 1)
Options:
  • A $\mathrm{C}_2 \mathrm{H}_4 \stackrel{\mathrm{H}_2 / \mathrm{Ni}}{\longrightarrow} \mathrm{C}_2 \mathrm{H}_6$
  • B $\mathrm{PCl}_5+\mathrm{Cl}^{-} \longrightarrow \mathrm{PCl}_6^{-}$
  • C $\mathrm{BF}_3+\mathrm{F}^{-} \longrightarrow \mathrm{BF}_4^{-}$
  • D $\mathrm{NH}_3+\mathrm{H}^{+} \longrightarrow \mathrm{NH}_4^{+}$
Solution:
1753 Upvotes Verified Answer
The correct answer is: $\mathrm{NH}_3+\mathrm{H}^{+} \longrightarrow \mathrm{NH}_4^{+}$
The total number of electron pairs (bond pairs + lone pairs) is the same for $\mathrm{NH}_3$ and $\mathrm{NH}_4^{+}$. Thus, their hybridization is also the same that is $\mathrm{sp}^3$.

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