1.

Select the incorrect statement.A. The geometry of phosphorus in `H_(3)PO_(2),H_(3)PO_(3)` and `H_(3)PO_(34)` is tetrahedralB. `H_(3)PO_(2),H_(3)PO_(3)` and `H_(3)PO_(4)` are tribasic acidsC. `NH_(3)ltPH_(3)gtAsH_(3)ltSbH_(3)`: increasing acidic character.D. `CO_(2) lt SiO_(2) lt SnO_(2) lt PbO_(2):` increasing oxidising power.

Answer» Correct Answer - B
`H_(3)PO_(2), H_(3)PO_(3)` and `H_(3)PO_(4)` are having basicity respectively 1, 2 & 3.


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