Statement I: Phosphorous present in the organic compound is oxidized to phosphoric acid. It is precipitated as ammonium phospho molybdate by adding ammonium hydroxide.
Statement II: Phosphoric acid may be precipitated as MgNH₄PO₄by adding magnesia mixture, which on ignition yields Mg₃(PO₄)₂.

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Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect.

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I.

Both Statement I and Statement II are incorrect.

answer is D.

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Detailed Solution

The phosphorus containing organic compound is heated with fuming nitric acid, to oxidize phosphorus in to phosphoric acid. It is precipitated as ammonium phospho molybdate, (NH₄)₃PO_4.12MoO₃, by adding ammonia and ammonium molybdate. Alternatively, phosphoric acid may be precipitated as MgNH₄PO₄by adding magnesia mixture, which on ignition yields Mg₂P₂O₇.

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