Oxidation of Cyclohexene with Acidified KMnO4

Steps:

• Identify conditions: Cold, dilute acidified KMnO4 causes syn dihydroxylation to cis-1,2-cyclohexanediol.
• Identify conditions: Hot, concentrated acidified KMnO4 causes oxidative cleavage of the alkene to adipic acid (hexanedioic acid).
• Match products to rows: Correct row shows diol for cold/dilute and dicarboxylic acid for hot/concentrated.
• Eliminate mismatches: Rows with incorrect products (e.g., epoxide, ketone) fail.

Why A is correct:

• A matches Baeyer's test for cold conditions (diol) and cleavage rule for hot conditions (adipic acid from cyclic alkene).

Why the others are wrong:

• B shows epoxide, which forms from peracids, not KMnO4.
• C shows ketone, incorrect for alkene oxidation without cleavage.
• D shows no reaction or wrong diacid, ignoring condition-specific products.

Final answer: A