1.

The pair that contains no P-H bonds in each of the oxoacids is :

Answer»

`H_4P_2O_5 and H_3PO_3`
` H_3PO_3and H_3PO_2`
` H_3PO_4and H_4P_2O_6`
` H_3PO_2 and H_4P_2O_5`

ANSWER :C


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