1.

Consider H_(3)PO_(2),H_(3)PO_(3),H_(3)PO_(4) and H_(4)P_(2)O_(7) . Which of the above oxoacids resultsinto two series of salts ?

Answer»

`H_(3)PO_(2)`
`He_(3)PO_(3)`
`H_(3)PO_(4)`
`H_(4)P_(2)O_(7)`

SOLUTION :Phosphorous acid ` (H_3PO_3)`is a diprotic acid . It formstwo seriesof salts such as `NaH_2PO_3`and `Na_2HPO_3` but NONE of the type `NaPO_3` with NaOH . Its structureis as


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