Question
$$C{H_3}C{H_2}OH$$ can be converted into $$C{H_3}CHO$$ by
A.
catalytic hydrogenation
B.
treatment with $$LiAl{H_4}$$
C.
treatment with pyridinium chlorochromate
D.
treatment with $$KMn{O_4}$$
Answer :
treatment with pyridinium chlorochromate
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.
\[C{{H}_{3}}C{{H}_{2}}OH\xrightarrow{PCC}C{{H}_{3}}CHO\]