`H_3 PO_3`, phosphorus acid is

Give the structure and basiciy of H_3PO_3 (Phosphorus acid)

The reaction H_3PO_2+D_2OtoH_2DPO_2+HDO indicates that hypo-phosphorus acid is

Both phosphoric and phosphorus acid contains equal number of hydrogen atoms. But H_3PO_3 is dibasic and H_3PO_4 Is tribasic. Give reason.

The basicity of phosphorus acid (H_3 PO_3) is ______ .

The basicity of phosphorus acid (H_3 PO_3) is ______ .

The normally of 0.3 M phosphorus acid (H_(3) PO_(3)) is

The normally of 0.3 M phosphorus acid (H_(3) PO_(3)) is