In which of the following reactions is a new carbon-carbon bond not formed?

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In which of the following reactions is a new carbon-carbon bond not formed? Answer: Cannizzaro reaction

Wurtz, Friedel–Crafts, and Aldol condensation → all form new C–C bonds. Cannizzaro reaction → involves disproportionation of aldehydes (one molecule oxidized, the other reduced) without C–C bond formation.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.