Question

The most suitable reagent for the conversion of $RC{{H}_{2}}OH\xrightarrow[{}]{{}}RCHO$ is

• A. $KMn{{O}_{4}}$
• B. ${{K}_{2}}C{{r}_{2}}{{O}_{7}}$
• C. $Cr{{O}_{3}}$
• D. PCC (pyridine chloro chromate)

Answer 1

Answer: (D)

PCC (pyridine chloro chromate)

Answer 2

By oxidation, alcohols are converted into aldehydes. Hence, mild oxidising agent like PCC is used to convert alcohols into aldehydes. $RCH _{2} OH {->[PCC]} RCHO$ Strong oxidising agents like acidified $KMnO _{4}$ acidified $K _{2} Cr _{2} O _{7}$ if used, convert alcohols directly into acids, thus they are not used for oxidation of alcohol to aldehydes.