Alcohols and Ethers - Result Question 29

####32. The correct statement(s) about the following reaction sequence is (are)

Cumene (C9H12) (ii) H3O+(i) O2PCHCl3/NaOH

Q (major) +R (minor), QNaOHPhCH2BrS

(2016 Adv.)

(a) R is steam volatile

(b) Q gives dark violet colouration with 1 aqueous FeCl3 solution

(c) S gives yellow precipitate with

2, 4-dinitrophenylhydrazine

(d) S gives dark violet colouration with 1 aqueous FeCl3 solution

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Answer:

Correct Answer: 32. (a)

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 FeCl3 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 FeCl3 thus, incorrect.



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