Which of the following on oxidation with alkaline $K M n O_{4}$ followed by acidification with dil. $H C l$ gives terephthalic acid?

p-Ethyl toluene

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n-Butane

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1,3 - Di-isopropyl benzene

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m-Xylene

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Solution

The correct option is A p-Ethyl toluene
Terephthalic acid is the organic compound with formula $C_{6} H_{4} (C O O H)_{2}$ . p-Ethyltoluene is the compound which gives terepthalic acid on oxidation with $K M n O_{4}$ followed by $H C l$ . Both the alkyl $(- C H_{3}$ and $- C H_{2} C H_{3})$ groups of compound are replaced by $- C O O H$ group.

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K M n O_{4}

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