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Carbonyl carbon hybridization:
Asp³
Bsp³d
Csp² (planar, 120° bond angles)
Dsp
Answer & Solution
Correct answer: C. sp² (planar, 120° bond angles)
C=O is sp² (3 σ bonds + 1 π in C=O). Trigonal planar around C. Important for nucleophilic attack from above/below plane.
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