AIPMT PRELIMS 2011 Chemistry Dumas Method MCQ Question
In Dumas method of estimation of nitrogen, 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at 300 K = 15 mm)
14.45
15.45
16.45
17.45
Correct Answer
Detailed Explanation
Using the ideal gas equation and correcting for aqueous tension, the volume of nitrogen is calculated. The percentage of nitrogen is then determined using the formula: % of N = (28 × 46.09 × 100) / (22400 × 0.35) = 16.45.
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