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Question:

The correct statement(s) about the following reaction sequence is(are): Cumene (C9H12) undergoes the following reactions: i) O2 ii) H3O+ P CHCl3/NaOH Q(major) + R(minor) Q + NaOH S. R is steam volatile. Q gives a dark violet coloration with 1.

R is steam volatile

S gives dark violet coloration with 1

Q gives dark violet coloration with 1

S gives yellow precipitate with 2, 4- dinitrophenylhydrazine

Solution:

Q is steam volatile, not R. Q and R show a positive test with 1. The reaction sequence involves the autoxidation of cumene followed by acid hydrolysis to form phenol and acetone. Acetone (Q) is steam volatile, while phenol (R) is not. The dark violet coloration is likely due to a reaction with ferric chloride (1), a common test for phenols. Therefore, the correct statement is that Q gives a dark violet coloration with 1 (ferric chloride).