JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization
\(0.2\, g\) of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of \(N _{2}\) evolved (at STP) was found to be \(22.400 \,mL\). The percentage of nitrogen in the compound is \(.......\). [nearest integer] (Given: Molar mass of \(N _{2}\) is \(28\, mol ^{-1}\). Molar volume of \(N _{2}\) at STP : \(22.4\, L\) )
- A \(14\)
- B \(21\)
- C \(18\)
- D \(56\)
Answer & Solution
Correct Answer
(A) \(14\)
Step-by-step Solution
Detailed explanation
weight of organic compound \(=0.2\, g\) \(\text { mass of } N _{2}( g ) \text { evolved }=\frac{22.4 \times 10^{-3}}{22.4} \times 28\) \(=28 \times 10^{-3} \,g\) \(\% \text { of } N =\frac{28 \times 10^{-3}}{0.2} \times 100=14\)
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