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ChemistryPRACTICAL ORGANIC CHEMISTRYELEMENTAL ANALYSISMedium2 minPYQ_2014

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In the Kjedahl's method for estimation of nitrogen present in soil sample, ammonia evolved from $0.75 g$ of sample neutralized $10 m l$ of $1 M H_{2} {S O}_{4}$ The percentage of nitrogen in the soil is:NEET 2014

Options:

Answer:

Solution:

moles of $1 M H_{2} S O_{4} = 10 m m o l$

moles of $N H_{3}$ consumed $= 20 m m o l$

Weight of $N = \frac{14 \times 20}{1000} g = 0.280 g$

$% N = \frac{0 .280}{0 .75} \times 100 = 37 .33 %$

Stream:NEETSubject:ChemistryTopic:PRACTICAL ORGANIC CHEMISTRYSubtopic:ELEMENTAL ANALYSIS

⏱ 2mℹ️ Source: PYQ_2014

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