Option A: Ammonia water is a weak base and cannot be dissociated into ionic form in ionic equation: Al3++3NH3 H2O → Al (OH) 3↓+3NH4+.
Option b: condition not specified: power on.
Option D: The ion charges at both ends of the equation are not conserved, and the correct writing is 2fe2++2h+H2O2 → 2fe3++2h2o.