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JEE Main levelOne or more correct optionsDifficulty 2 of 3o2032

Which reagent combinations convert propene mainly into propan-2-ol?

Adilute $H X_{2} SO X_{4}$ , then warm water
B $Hg (OAc) X_{2} / H X_{2} O$ , then $NaBH X_{4}$
C $BH X_{3} \cdot THF$ , then $H X_{2} O X_{2} / NaOH$
D $HBr$ with peroxide, then aqueous $KOH$

Answer: A, B

Acid hydration and oxymercuration-demercuration are both Markovnikov and give propan-2-ol. Hydroboration-oxidation gives propan-1-ol. HBr with peroxide gives 1-bromopropane, which with aqueous KOH gives propan-1-ol.

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