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Which of the following is 'a' FALSE statement? (1) Carius tube is used for the estimation of sulphur in an organic compound (2) Carius method is used for the estimation of nitrogen in an organic compound (3) Phosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as Mg2P2O7 by adding magnesia mixture. (4) Kjeldahl's method is used for the estimation of nitrogen in an organic compound

1. Carius tube is used for the estimation of sulphur in an organic compound
2. Carius method is used for the estimation of nitrogen in an organic compound
3. Phosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as Mg2P2O7 by adding magnesia mixture.
4. Kjeldahl's method is used for the estimation of nitrogen in an organic compound

Correct answer: Carius method is used for the estimation of nitrogen in an organic compound

Solution

The Carius method is specifically designed for the determination of sulfur in organic compounds, not nitrogen, making the statement about its use for nitrogen estimation false.

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