Answer

`A -q,s;B-p;C-q,s;D-p,r`

Explanation

A) `3CuO+2NH_3overset(Delta)rarr3underset("Copper metal")(ul(Cu)+3H_2O+N_2)` B) `PH_4I+NaOHoverset(Delta)rarr PH_(3)+NaI+H_2O`
C) `Ba(N_3)_2overset(Delta)rarrBa+3N_2` D) `2H_(3)PO_(2)overset(Delta)rarrPH_3+H_(3)PO_(4)` - disproportionation reaction