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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3si271

For the compound shown, select all correct statements.

  1. AIt gives a violet colour with neutral .
  2. BIt gives a red precipitate with Fehling's solution.
  3. CIt gives an orange precipitate with 2,4-DNP.
  4. DIt liberates from aqueous .

Answer: A, C

The compound shown is salicylaldehyde. The free phenolic OH gives a violet colour with neutral , and the CHO group gives an orange hydrazone with 2,4-DNP. As an aromatic aldehyde it fails Fehling's test, and the phenolic OH is too weakly acidic to liberate from bicarbonate.
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