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Phosphorus

In organic co...

Question

In organic compounds, phosphorus is estimated as:

A

M g_{2} P O_{7}

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B

M g (N H_{4}) P O_{4}

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C

M g (P O_{4})_{2}

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D

H_{3} P O_{4}

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Solution

The correct option is B $M g (N H_{4}) P O_{4}$
Phosphorus can be estimated by precipitating it as $M g N H_{4} P O_{4}$ by adding magnesia mixture, which on ignition yields ${M g}_{2} P_{2} O_{7}$ .

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Q. In the Carius method for the estimation of phosphorus, 0.31 g of an organic compound gave 0.222 g of

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