Identify A, B, and C.
i) Isomeric alcohols (A), (B), and (C) $(C_{5} H_{12} O)$ .
ii) (A) and (B) react with chromic acid solution. (B) gives an acid (D).
iii) Reactivity with HBr is: $C > A ≫ B .$ All give the same compound, $C_{5} H_{11} B r (E) .$
iv) Only (A) is oxidised by NaOI.

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Solution

So, since $(B)$ on oxidation gives acids since it is primary alcohal. $(A)$ gives ketone upon oxidation since it is secondary, and also reduces $N a O I$ (Haloform test) to give ${C H I}_{3}$ and corresponding acid, since $(A)$ has $({C H}_{3} - | O H C H -)$ group.

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