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Which of the following chemical tests can specifically identify a primary amino (-NH2) group in an organic compound?

1. Iodoform test
2. Victor Meyer's test
3. Carbylamine reaction
4. Liebermann's reaction

Correct answer: Carbylamine reaction

Solution

The carbylamine reaction (isocyanide test) is specific for primary amines: when treated with chloroform and alcoholic KOH, primary amines yield foul-smelling isocyanides. Secondary and tertiary amines do not give this test.

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