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JEE Main20268 April 2026Evening ShiftChemistryAldehydes and KetonesActual

' x ' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ' y ' is the major product obtained from the benzene by reacting it with ethanoyl chloride in the presence of anhydrous AlCl₃ . Product (major) obtained by heating x and y in the presence of alkali is z . Total number of (pi) electrons in z is ________.

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Step-by-step solution

Benzene reacts with CO and HCl in the presence of CuCl to give benzaldehyde ( x ) via the Gattermann-Koch reaction. Benzene reacts with ethanoyl chloride ( CH₃COCl ) in the presence of anhydrous AlCl₃ to give acetophenone ( y ) via Friedel-Crafts acylation. Heating benzaldehyde ( x ) and acetophenone ( y ) in the presence of alkali results in a crossed aldol condensation to form benzalacetophenone ( z ). C₆H₅CHO + CH₃COC₆H₅ OH^-, C₆H₅-CH=CH-CO-C₆H₅ + H₂O The structure of z ( C₆H₅-CH=CH-CO-C₆H₅ ) contains two phenyl

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