1.

निम्नलिखित में फॉस्फोरस कि ऑक्सीकरण अवस्थाएँ क्या है ? `H_(3),PO_(3), (b) PCI_(3), (c) Ca_(2)P_(2), (d) Na_(3)PO_(4)(3) POF_(3)`

Answer» (a) `H_(3)PO_(3): overset(+1)(H_(3))overset(x-2)(PO_(3))`
`3(+1)+x+3(-2)=0`
या `x-3=0` या `x=+3`
`PCI_(3): overset(x)(P)overset(-1)(CI_(3))`
`x+3(-1)` या `x=+3`
(c) `Ca_(3)P_(2): overset(+2)(Ca_(3))overset(x)(P_(2))`
`3(+2)+2(x)=0` तथा `x=-3`
(d) `NaPO_(4): overset(+1)(Na_(3))overset(x-2)(PO_(4))`
`3(+)+x+4(-2)` या `x=+5`
(e) `POF_(3): overset(x)(P)overset(-2)(O) overset(-1)(F_(3))`
`x+(-2)+3(-1)=0` या `x=+5`


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