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Alcohols, Phenols, and Ethers — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols, and Ethers1 Mark
MCQ
CH3CH2OH can be converted into CH3CHO by ______________.
  • A
    Catalytic hydrogenation.
  • B
    Treatment with LiAlH4.
  • C
    Treatment with pyridinium chlorochromate.
  • D
    Treatment with KMnO4.
✓

Answer

  1. Treatment with pyridinium chlorochromate.

Explanation:

Alcohols are oxidized to aldehydes and finally to acids.

$\text{CH}_3\text{CH}_2\text{OH}\xrightarrow{[\text{O}]}\text{CH}_3\text{CHO}\xrightarrow{[\text{O}]}\text{CH}_3\text{COOH}$

Oxidations can be stopped at aldehyde stage by using puridinium chlorochromate (CrO3C5H5N.HCl)

$\text{CH}_3\text{CH}_2\text{OH}\xrightarrow{\text{PCC}}\text{CH}_3\text{CHO}$

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