alleryA Grignard reagent R-MgX reacts with **methanal (HCHO)** to produce, after hydrolysis:
AA secondary alcohol
BA ketone
CA tertiary alcohol
DA primary alcohol (R-CH₂-OH)
Answer & Solution
Correct answer: D. A primary alcohol (R-CH₂-OH)
**HCHO + RMgX → R-CH₂-OMgX → (H₂O) → R-CH₂-OH** (primary alcohol).
**General rule:** **HCHO
→ 1° alcohol; other RCHO
→ 2° alcohol; ketone → 3° alcohol**.
Powerful C-C bond-forming reaction.
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