Oxidation products of cis-but-2-ene and their reactions with Na and NaOH

Steps:

• Cis-but-2-ene reacts with cold dilute acidified KMnO4 via syn dihydroxylation to give meso-butane-2,3-diol (X).
• Cis-but-2-ene reacts with hot concentrated acidified KMnO4 via oxidative cleavage to give CH3COOH (Y).
• Na metal reacts with -OH in X (diol) and -COOH in Y (acid) to produce H2 gas in both cases.
• NaOH reacts with acidic Y to form CH3COONa + H2O, but neutral X shows no reaction.

Why B is correct:

• B states both X and Y react with Na metal (due to active H in -OH/-COOH) and only Y reacts with NaOH (acid-base neutralization), matching the products' properties.

Why the others are wrong:

• A: Irrelevant and incomplete description of samples, ignores specific reactions.
• C: Falsely claims only one reacts with Na and none with NaOH, contradicting both reacting with Na.
• D: Erroneously suggests only one reacts with Na and both with NaOH, ignoring X's neutrality to NaOH.

Final answer: B