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An alcohol A(C(4)H(10)O) on oxidation wi...

An alcohol `A(C_(4)H_(10)O)` on oxidation with acidified potassium dichromate gives acid `B(C_(4)H_(8)O_(2))`. Compound A when dehydrated with conc. `H_(2)SO_(4)` at 443 K gives compound C. Treatment of C with aqueous `H_(2)SO_(4)` gives compound `D(C_(4)H_(10)O)` which is an isomer of A. Compound D is resistant ot oxidation but compound A can be easily oxidised. Identify A, B, C and D. Name the type of isomerism exhibited by A and D.

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The data suggests the compound [A] is a primary alcohol since upon oxidation, it gives a carboxylic acid [B] with the same number of carbon atoms. The compound [D] is an isomeric secondary alcohol and it is expected to resist oxidation. The chemical reaction are listed :
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