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JEE PYQ: Aldehydes And Ketones Question 12

Question 12 - 2021 (26 Feb Shift 2)

Branched ketone $\xrightarrow{\text{Zn/HCl}}$ $\xrightarrow{\text{Cr}_2\text{O}_3, \text{773K, 10-20 atm}}$ product?

(1). (Ethyl phenyl ketone)

(2). (Propylbenzene)

(3). (Ethylbenzene)

(4). (Xylene)

Show Answer

Answer: (3)

Solution

Clemmensen reduction (Zn/HCl) reduces C=O to CH$_2$. Then aromatization with Cr$_2$O$_3$ at 773K gives ethylbenzene.


Learning Progress: Step 12 of 49 in this series