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Q.

In the given reaction 

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The number of  electrons (not involved in bond formation) present in the product ‘P’ is _____

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answer is 4.

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Detailed Solution

The major product ‘P’ formed from cyclohexanone with OH⁻/heat (aldol condensation and dehydration) is 2-cyclohexen-1-one (an α,β-unsaturated ketone).

Calculation of Non-Bonding Electrons in 2-cyclohexen-1-one

  • Oxygen atom in the >C=O group has 2 lone pairs = 4 electrons.
  • No other atoms (C/H) contribute non-bonding electrons in this compound.

Answer: The number of electrons (not involved in bond formation) present in the product ‘P’ is 4 (from the two lone pairs on oxygen). 

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In the given reaction The number of  electrons (not involved in bond formation) present in the product ‘P’ is _____