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CBSE Class 10 Answered

In question 8th why we use alk KMnO4 instead of CrO3 for oxidation of alcohol
Asked by meenakshi2005suhag | 07 Jan, 2019, 08:02: PM
answered-by-expert Expert Answer
When ethanol reacts with chromium trioxide i.e., CrO3 (only partial oxidation occurs and ethanal (acetaldehyde) is formed.
While when ethanol is heated with alkaline KMnO4 it forms ethanoic acid (acetic acid) due to complete combustion.
 
Hence oxidation of ethanol with CrO3 produces ethanal while ethanol, when oxidised with alkaline KMnO4, produces ethanoic acid.
Answered by Ramandeep | 10 Jan, 2019, 12:00: PM
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