Question

It is possible to produce hydrogen by decomposition of acidulated water by which means ???

Answer 1

Yes it is possible by electrolysis process

Answer 2

Water is a poor conductor of electricity, but it does contain some hydrogen ions, H+, and hydroxide ions, OH-. These ions are formed when a small proportion of water moleculesnaturally dissociate. If water is acidified with a little dilute sulfuric acid:

H+ ions are attracted to the cathode, gain electrons and form hydrogen gas

OH- ions are attracted to the anode, lose electrons and form oxygen gas