The experiment suggests that hydrogen ions in HCl are produced in the presence of water, indicating that the separation of H+ ion from HCl molecules requires water.

Glucose and alcohol solutions do not conduct electricity, indicating that they do not facilitate the flow of electric current and thus are not acidic.

The bulb glows in the presence of acids because the acidic solution allows the flow of electric current by carrying ions.

The activity aims to investigate whether all compounds containing hydrogen are acidic.

The common observation when acids react with metals is the generation of hydrogen gas, as acids donate protons to metals, resulting in the release of hydrogen gas.