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Q.

28mg of an organic compound containing nitrogen was digested according to kjeldahl’s method  the evolved ammonia was absorbed in 20ml of 0.1M HCl solution. The excess of the acid required 15ml. Of 0.1M NaOH solution for complete neutralization. The percentage of 7N is the compound is  

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answer is 25.

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Detailed Solution

%N=1.4×(N1V1N2V2)w

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28mg of an organic compound containing nitrogen was digested according to kjeldahl’s method  the evolved ammonia was absorbed in 20ml of 0.1M HCl solution. The excess of the acid required 15ml. Of 0.1M NaOH solution for complete neutralization. The percentage of 7N is the compound is