In the presence of an active metal, do bases usually release hydrogen gas?

1 Answer
Jan 15, 2018

On reacting with a active metal , bases generally do not release hydrogen gas


But there are some exceptions,
Such as when zinc reacts with sodium hydroxide,hydrogen gas is released with the formation of sodium zincate.
The reaction is given below,
Zn + 2NaOH --> #Na_2ZnO_2 + H_2#
Metals such as aluminium also give this reaction