Which reagent reacts readily with butanal (CH3CH2CH2CHO), but not with 2-pentanone (CH3CH2CH2COCH3)? | Organic Chemistry

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Question

Which reagent reacts readily with butanal (CH₃CH₂CH₂CHO), but not with 2-pentanone (CH₃CH₂CH₂COCH₃)?

K₂Cr₂O₇ in aqueous H₂SO₄

✓ Correct

I₂ in aqueous NaOH

CH₃MgBr in Et₂O

NaBH₄ in CH₃OH

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