How many of the following compounds have sp3 hybridisation?(i) SO42- (ii) SO32- (iii) PO43- (iv) NH4+ (v) I3⊝ (vi) CO32- (vii) C2O42-

The acids, per acids and their ions have same hybridisation of central atom.Thus, SO42−,SO32−,PO43−,NH4+ all have same sp3 hybridisation.v.I3⊝ have sp3d hybridisation.vi. CO32- and vii. C2O42- have sp2 hybridisation.