Alcohols and Ethers - Result Question 29
32. The correct statement(s) about the following reaction sequence is (are)
Cumene $\left(C _9 H _{12}\right) \xrightarrow[\text { (ii) } H _3 O^{+}]{\text {(i) } O _2} P \xrightarrow{CHCl _3 / NaOH}$
$Q$ (major) $+R$ (minor), $Q \underset{PhCH _2 Br}{NaOH} S$
(2016 Adv.)
(a) $R$ is steam volatile
(b) $Q$ gives dark violet colouration with $1 %$ aqueous $FeCl _3$ solution
(c) $S$ gives yellow precipitate with 2, 4-dinitrophenylhydrazine
(d) $S$ gives dark violet colouration with $1 %$ aqueous $FeCl _3$ solution
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Answer:
Correct Answer: 32. (b,c)
Solution:
(a) $R$ is not steam volatile, but $Q$ is steam volatile thus, incorrect.
(b) $Q$ has enolic group thus, gives violet colour with $1 %$ aqueous $FeCl _3$ solution thus, correct.
(c) $S$ has carbonyl group hence, gives yellow precipitate with 2, 4-DNP thus, correct.
(d) $S$ does not give colour with $FeCl _3$ thus, incorrect.
BETA
