Question

Which acid-base chemical reaction is irreversible?

Answer 1

If your question is which ones listed is irreversible then note you didn't list any. Technically no reaction is irreversible, however, there are many reactions that go so far to completion that, for all practical purposes, they are irreversible. Said another way, all reactions occur to at least a small extent although some of them are so small (Keq <<<<< 1) that for all practical purposes they just don't occur.