A. bromine in tetrachloromethane
B. concentrated tetraoxosulphate(VI) acid
C. aqueous potassium tetraoxomanganate(VII).
D. sodium hydroxide solution.

Correct Answer:

Option B – concentrated tetraoxosulphate(VI) acid

Explanation

An alkene reacts with conc. H2SO4 to yield an alkyl hydrogen tetraoxosulphate (VI). The compound formed undergoes hydrolysis when boiled with water to yield an alcohol.

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