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for which of ...

Question

for which of the following compounds Kjeldahl method can be used to determine the percentage of nitrogen ? a. nitrobenzene b. pyridine c. alanine d. diazomethane

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Solution

The Kjeldahl method is not applicable to nitrogen compounds containing nitrogen in nitro group, azo group and in ring structures as nitrogen in these groups cannot form ammonium sulphate.
So, the method is not applicable to nitrobenzene, pyridine and diazomethane.

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