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Question

0.243 g of a organic compound containing nitrogen was Kjeldahlized and ammonia gas evolved was absorbed in 90.3 ml of 110NHCI. unused acid required 20 ml of 0.2NNaOH for complete neutralization . percentage of nitrogen in the sample is?

A
30.12%
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B
3.012%
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C
60.245%
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D
60.24%
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Solution

The correct option is A 30.12%
For Kjeldahl method,
% Nitrogen=1.4×(NacidVacidNbaseVbase)weight of organic compound
=1.4×(110×90.30.2×20)0.243
30.12%

Hence, this is the answer.

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