Chapter: Alcohols, Phenols and Ethers· Chemistry

A better reagent to convert primary alcohol to aldehyde is ____.

Q.1 (x) A better reagent to convert primary alcohol to aldehyde is ____.

A. chromic anhydride

B. pyridinium chlorochromate

C. potassium permanganate

D. potassium dichromate

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Answer: (b) pyridinium chlorochromate

PCC (C₅H₅NH⁺ClCrO₃⁻) in CH₂Cl₂ is a mild oxidising agent that stops the oxidation of a primary alcohol at the aldehyde stage, e.g. CH₃CH₂OH → CH₃CHO. Strong oxidants such as acidified KMnO₄ or K₂Cr₂O₇ oxidise the aldehyde further to the carboxylic acid.

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A better reagent to convert primary alcohol to aldehyde is ____.

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