Analytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide — Chemistry STD 10 — Question

2 Al +\underset{\text { Hot and conc. }}{2 NaOH +2 H _2 O } \longrightarrow \underset{\substack{\text { Sodium meta aluminate } \\ \text { (colourless) }}}{2 NaAlO _2+3 H _2}