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Asked in Premeth LR-06 — Inheritance, Evolution, Atomic Spectra, Carboxylic Acids, Phrasal Verbs

1 mole of X, where X is an organic compound requires 0.5 moles of oxygen to produce carboxylic acid, the compound may be

Correct answer: D. Aldehyde

  • A. Alcohol
  • B. Ketone
  • C. Ether
  • D. Aldehyde

Explanation

Aldehydes are easily oxidized to carboxylic acids with 0.5 moles of oxygen per mole of aldehyde, consistent with the reaction conditions provided in the question. Alcohols require more oxygen as they first oxidize to aldehydes, then to carboxylic acids. Ketones do not directly oxidize to carboxylic acids without breaking carbon-carbon bonds, and ethers have different oxidation requirements altogether, making these options incorrect.

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About Nomenclature, Structure and Preparation

Carboxylic acids are prepared by oxidising primary alcohols or aldehydes, hydrolysing nitriles, esters and amides, and carbonating suitable organometallic compounds. Their structures, IUPAC naming, resonance stabilisation and acidic character explain why carboxylic acids differ from alcohols and phenols, despite all containing oxygen and hydrogen.

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