For the reaction sequence given below, the correct statement(s) is(are)
(A)P is optically active.
(B)S gives Bayer's test.✓ Correct
(C)Q gives effervescence with aq. NaHCO3.✓ Correct
(D)R is an alkyne.
Answer: (B), (C)
Solution
Analyzing the reaction sequence:
(A) is incorrect: P does not have a chiral center, so it is not optically active.
(B) is correct: S contains a C=C double bond and gives a positive Baeyer's test (decolorization of KMnO₄ solution due to oxidation of the alkene to a diol).
(C) is correct: Q is a carboxylic acid, which reacts with aqueous NaHCO₃ to produce CO₂ gas (effervescence).
(D) is incorrect: R is not an alkyne based on the reaction pathway shown.
JEE Advanced · 2025 · 18 May 2025 · Paper 2 · One or more correct options
