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Subject - Chemistry:

Basics

MCQ - 44-2230

Question:

Which class of compound gives this positive result?

  1. Alcohols
  2. Carboxylic acids
  3. Aldehydes
  4. Carboxylic acids

Correct Answer: B

Explanation:

2, 4-dinitrophenylhydrazine reagent (Brady’s Test) is a test for the carbon-oxygen double bond. Dinitrophenylhydrazine does not react with other carbonyl-containing functional groups such as carboxylic acids, amides, and esters.

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645 MCQ for effective preparation of the test of Basics of Chemistry section.

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