JEE Main Chemistry question

ChemistryOrganic Chemistry - Some Basic Principles and TechniquesJEE Main

The ammonia evolved from the treatment of 0.30 g of an organic compound (for the estimation of nitrogen) was passed into 100 mL of 0.1 M sulphuric acid. The excess acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralization. The organic compound is

Answer: (C)

Solution

Total acid = 100 mL × 0.2 N (0.1 M H₂SO₄ diprotic) = 20 meq. NaOH used for excess acid = 20 mL × 0.5 N = 10 meq. Acid consumed by NH₃ = 20 − 10 = 10 meq = 10 mmol NH₃ → mass N =

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Question ID VK-139555