JEE PYQ: Aldehydes And Ketones Question 41
Question 41 - 2019 (11 Jan Shift 1)
$p$-methylacetophenone $\xrightarrow{\text{KMnO}_4/\text{KOH}/\Delta, \text{then H}_2\text{SO}_4}$ ?
(1). (HOOC-C$_6$H$_4$-COCOOH)
(2). (OHC-C$_6$H$_4$-COOH)
(3). (HOOC-C$_6$H$_4$-COOH (terephthalic acid))
(4). (HOOC-C$_6$H$_4$-COCH$_3$)
Show Answer
Answer: (3)
Solution
KMnO$_4$/KOH/$\Delta$ oxidizes both CH$_3$ and COCH$_3$ on benzene ring to COOH groups, giving terephthalic acid.
BETA
