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  4. While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.25 g of the compound neutralized 2.5 mL of 2 M H 2 SO 4. The percentage of nitrogen present in organic compound is

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Q. While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $0.25\, g$ of the compound neutralized $2.5 \,mL$ of $2\, M \,H _2 SO _4$. The percentage of nitrogen present in organic compound is _____

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Solution:

$ \% N =\frac{1.4\left( N _1 V _1\right)}{\text { massof organic compound }} $
$ \% N =\frac{1.4(2.5 \times 2 \times 2)}{0.25}=56$