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Decarboxylation of all six possible forms of diaminobenzoic acid C 6 H 3 (NH 2 ) 2 COOH yields three products A, B and C. Three acids give a product ‘A’, two acids give a product ‘B’ and one acid gives a product ‘C’. The melting point of product ‘C’ is

1. 63ºC
2. 90ºC
3. 104ºC
4. 142ºC

Correct answer: 142ºC

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