1.

2.79g of an organic compound when heated in Carius tube with conc.HNO_(3) and H_(3)PO_(4) formed converted into MgNH_(4)*PO_(4) ppt. The ppt. on heating gave 1.332 g of Mg_(2)P_(2)O_(7) . The percentage of P in the compound is

Answer»

`23.3%`
`13.33%`
`33.33%`
`26.66%`

SOLUTION :Percentage of P`=(62)/(222)times("wt.of" Mg_(2)P_(2)O_(7))/("wt.of COMPOUD")times100=(62)/(222)times(1.332)/(2.79)times100=13.33%`


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