Draw the structures of the following :
(a) `H_(3)PO_(2)`
(b) `H_(3)PO_(3)`
(c) `H_(3)PO_(4)`
(d) `H_(4)P_(2)O_(5)`
(e) `H_(4)P_(2)O_(7)`
(f) `(HPO_(3))_(3)`

Draw the structure of the following molecules (i) H_(3)PO_(2) (ii) H_(2)S_(2)O_(7) (iii) XeOF_(4) .

Number of acids having central atom in +3 oxidation state among the following is (a) HNO_(2) (b) HNO_(3) (c) H_(3)PO_(2) (d) H_(3)PO_(3) (e) H_(3)PO_(4) (f) H_(4)P_(2)O_(5) (g) H_(4)P_(2)O_(7) (h) H_(2)SO_(3) (i) H_(2)S_(2)O_(7) (j) H_(2)S_(2)O_(8) (k) H_(2)SO_(4)

The order of the oxidation state of the phosphorus in H_(3)PO_(2),H_(3)PO_(4),H_(3)PO_(3) and H_(4)P_(2)O_(6) is

(i) State the formula and name the conjugate base of each of the following species : (a) H_(3)O^(+) (b) HSO_(4)^(-) (C ) NH_(4)^(+) (d) HF (e ) CH_(3)COOH (f) CH_(3)NH_(3)^(+) (g) H_(3)PO_(4)(h)H_(2)PO_(4)^(-). (ii) State the formula and name the conjugate acid of each of the following species : (a) OH^(-) (b) HPO_(4)^(2-) (C) H_(2)PO_(4)^(-) (d) CH_(3)NH_(2) (e) CO_(3)^(2-) (f) NH_(3)(g) CH_(3)COO^(-) (h) HS^(-)

The true statement of the oxoacids of phosphorus H_(3)PO_(2),H_(3)PO_(3) and H_(3)PO_(4) is

The true statement of the acids of phosphorus H_(3)PO_(2),H_(3)PO_(3) and H__(3)PO_(4) is :