CH3CH2OH can be converted into CH3CHO by ________________ . I. Catalytic hydrogenation II. Treatment with LiA1H4 III. Treatment with pyridinium chlorochromate IV. Treatment with KMnO4

This is a multiple choice answer as classified in NCERT Exemplar (III) Treatment with pyridinium chlorochromate The pyridinium chlorochromate is a complex of chromium trioxide with pyridine. This reagent is preferred for mild oxidation to form aldehydes and hence the oxidation to carboxylic acid is prevented. Primary alcohols are oxidized to form aldehyde, whereas secondary and tertiary alcohols are oxidized to form ketones. The conversion of a hydroxyl group to aldehyde can be done by the removal of hydrogen atoms (Oxidation), looking at the following options; pyridinium chlorochromate and potassium dichromate are both oxidizing agents. However, when pyridinium chlorochromate is used, it is a weaker oxidizing agent compared to potassium permanganate; hence, it reduces ethanol to acetaldehyde (ethanal). CH3CH2OH CH3CHO

CH₃CH₂OH can be converted into CH₃CHO by ________________ .

I. Catalytic hydrogenation

II. Treatment with LiA1H₄

III. Treatment with pyridinium chlorochromate

IV. Treatment with KMnO₄

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Payal Gupta | Contributor-Level 10

7 months ago

This is a multiple choice answer as classified in NCERT Exemplar

(III) Treatment with pyridinium chlorochromate

The pyridinium chlorochromate is a complex of chromium trioxide with pyridine. This reagent is preferred for mild oxidation to form aldehydes and hence the oxidation to carboxylic acid is