Multiple choice

In the Carius method for quantitative elemental analysis, phosphorus in an organic compound is estimated in the form of

  1. magnesium pyrophosphate

  2. magnesium ammonium phosphate

  3. magnesia mixture

  4. ammonium phosphomolybdate

  5. phosphoric acid

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A Correct answer
Explanation

Phosphorus, present in an organic compound, is estimated by Carius method as magnesium pyrophosphate.