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ChemistryPRACTICAL ORGANIC CHEMISTRYELEMENTAL ANALYSISMedium2 minPYQ_2022
ChemistryMediumnumerical

0.2 gof an organic compound was subjected to estimation of nitrogen by Dumas method in which volume ofN2evolved (at STP) was found to be22.400 mL. The percentage of nitrogen in the compound is - [nearest integer] (Given: Molar mass ofN2is28 g mol-1, Molar volume ofN2atSTP:22.4 L)

Answer:
14.00
Solution:

Volume of N2 gas is equal to 22.4 ml at STP
Mole of N2 gas = 22.422400=11000
Weight of N2 gas =11000X 28

% of N in organic compound =281000X 1000.2=14%

Hence, The percentage of nitrogen in the compound is 14%

Stream:JEESubject:ChemistryTopic:PRACTICAL ORGANIC CHEMISTRYSubtopic:ELEMENTAL ANALYSIS
2mℹ️ Source: PYQ_2022

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