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JEE PYQ: Aldehydes And Ketones Question 42

Question 42 - 2019 (11 Jan Shift 2)

Which compound reacts with EtMgBr and decolourizes bromine water?

(1). (CN-substituted acetophenone)

(2). (Cyanoacetate)

(3). ($o$-methoxystyrene)

(4). (Vinyl phenol (OH + CH=CH$_2$))

Show Answer

Answer: (4)

Solution

Phenol OH reacts with Grignard (acid-base). Vinyl C=C decolourizes Br$_2$ water.


Learning Progress: Step 42 of 49 in this series