1.

The true statement for the acids of phosphorus. H_(3)PO_(2), H_(3)PO_(3) and H_(3)PO_(4) is :

Answer»

the ORDER of their ACIDITY is `H_(3)PO_(4) lt H_(3)PO_(3) lt H_(3)PO_(2)`
all of them are reducing in nature
all of them are tribasic acids
the GEOMETRY of phosphor us is tetrahedral in all the three

Solution :(i) The geometry of phosphorus is tetrahedral in all the three.

(II) The acidity increases with increase in oxidation number of central atom
`H_(3)overset(+1)(PO_(2)) lt H_(3)overset(+3)(PO_(3)) lt H_(3)overset(+5)(PO_(4))`
(iii) `H_(3)PO_(4)` is not reducing.
(iv) `H_(3)PO_(3)` is diabasic, while `H_(3)PO_(2)` is MONOBASIC.


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