Question

The correct statement(s) about the following reaction sequence is(are):

Cumene$\left(C_9{H}_{12}\right)\underset{ii)H_3{O}^{+}}{\overset{i)O_2}{\to }}P\stackrel{CHC{l}_3/NaOH}{\to }Q\left(major\right)+R\left(minor\right)Q\underset{PhC{H}_{2}Br}{\overset{NaOH}{\to }}S$

• A. R is steam volatile
• B. Q gives dark violet coloration with $1\%$ aqueous $FeC{l}_3$ solution
• C. S gives yellow precipitate with 2, 4- dinitrophenylhydrazine
• D. S gives dark violet coloration with $1\%$ aqueous $FeC{l}_3$ solution.

Answer 1

Answer: (B), (C)

The correct options are
B Q gives dark violet coloration with $1\%$ aqueous $FeC{l}_3$ solution
C S gives yellow precipitate with 2, 4- dinitrophenylhydrazine

Q is steam volatile not R.
Q & R show positive test with 1% aqueous $FeC{l}_3$ Solution. (Test for phenol)
Q, R, S show positive 2,4-dinitrophenyl hydrazine. (Test for carbonyl group)