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When NaH(2)PO(4) is heated then which of...

When `NaH_(2)PO_(4)` is heated then which of the following compound is formed?

A

`Na_(4)P_(2)O_(7)`

B

`Na_(3)PO_(4)`

C

`HPO_(3)`

D

`NaPO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
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The chemical name of NaH_(2)PO_(4) is -

In a gravimetric determination of P , an aqueous solution of dihydrogen phosphate ion [H_(2)PO_(4)^(-)] is treated with a mixture of ammonium and magnesium ions to precipitate magnesium ammonium phosphate, [Mg(NH_(4))PO_(4).6H_(2)O] . This is heated and decomposed to magnesium pyrophosphate [Mg_(2)P_(2)O_(7)] , which is weighed. A solution of H_(2)PO_(4)^(-) yielded 1.054 g of Mg_(2)P_(2)O_(7) . What weight of NaH_(2)PO_(4) was present originally? (Na=23, H=1, P= 31, O=16,Mg=24)

GRB PUBLICATION-SALT ANALYSIS-B. Dry Tests/Colour/Solubility/Heating Effects
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  14. Which of the following halide will not give halogen gas on heating?

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  19. When KMnO(4) is heated then which of the following compound is formed?

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