JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization
In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at 300 K and 715 mm pressure. The percentage of nitrogen in the organic compound is ______ \( \% \)
(Aqueous tension at 300 K is 15 mm).
- A 10
- B 15
- C 20
- D 25
Answer & Solution
Correct Answer
(B) 15
Step-by-step Solution
Detailed explanation
\(P_{ N _2}=(715-15) mm =\frac{700}{760} atm\) \(V _{ N _2}=70 ml =\frac{70}{1000} l\) \(n _{ N _2}=\frac{ PV }{ RT }=\frac{\left(\frac{700}{760}\right) \times\left(\frac{70}{1000}\right)}{0.0821 \times 300}\)…
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