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NEET 2016 Phase 1 · ChemistryPrevious Year Question

The pair of electrons in the given carbanion, , is present in which of the following orbitals?

Answer: (D) . \textbf{Answer:} (d) \textbf{Solution:} In the carbanion , the terminal carbanion carbon forms one sigma bond (to the adjacent carbon), participates in two pi bonds (the triple bond), and carries one lone pair.

  1. A.
  2. B.
  3. C.
  4. D.✓

Correct Answer

(D)

Solution & Explanation

\textbf{Answer:} (d) \textbf{Solution:} In the carbanion , the terminal carbanion carbon forms one sigma bond (to the adjacent carbon), participates in two pi bonds (the triple bond), and carries one lone pair. Two sigma/lone-pair electron domains (one sigma bond + one lone pair) mean the carbon is -hybridised, so the lone pair of the carbanion resides in an hybrid orbital. Hence (d).

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