Complete and balance the following reactions :
(i) `P_4O_10 + PCl_5 rarr"___"`
(ii) `NH_3 + NaOCl rarr "____" + NaCl + H_2 O`
(iii) `Ca(PO_4)_3 + 4H_3PO_4 rarr"____"`
(iv) `AgCl + NH_4OH rarr "_____" + "____"`
(v) `Pb(NO_3)_2 overset (Delta)rarr PbO + "___" + "____"`
(vi) `Mg + HNO_3 rarr "____" + "____"`.

Answer

(i) `POCl_3`
(ii) `NH_2 NH_2`
(iii) `Ca(H_2 PO_4)_2`
(iv) `[Ag(NH_3)_2]Cl + H_2 O`
(v) `NO_2 + O_2`
(vi) `Mg(NO_3)_2 + H_2`.

Explanation

(i) `P_4 O_10 + 6 P Cl_5 rarr 10 POCl_3`
(ii) `2 NH_3 + NaOCl rarr NH_2 NH_2 + NaCl + H_2 O`
(iii) `Ca_3(PO_4)_3 + H_3 PO_4 rarr 3 Ca(H_2 PO_4)_2`
(iv) `AgCl + 2NH_4 OH rarr [Ag(NH_3)_2] Cl + 2H_2 O`
`2 Pb (NO_3)_2 overset (Delta) rarr 2 PbO + 4 NO_2 + O_2`
(vi) `Mg + 2 HNO_3 rarr Mg(NO_3)_2 + H_2`.