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Decarboxylation of all six possible forms of diaminobenzoic acid C6H3(NH2)2COOH 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. 63°C
2. 90°C
3. 104°C
4. 142°C

Correct answer: 142°C

Solution

Product 'C' is derived from the unique structure of one specific form of diaminobenzoic acid, which upon decarboxylation results in a compound with a higher melting point due to its distinct molecular interactions and stability compared to the other products.

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