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Q. $CH_3CH_2OH$ can be converted into $CH_3CHO$ by

Alcohols Phenols and Ethers

Solution:

Pyridinium chlorochromate $(PCC)$, a complex of chromium trioxide with pyridine and $HCl$ gives good yield of aldehydes and prevents further oxidation to carboxylic acids.
$CH_3CH_2OH \xrightarrow{PCC} CH_3CHO$