Multiple choice general knowledge Which spell is used to open a locked door? Alockdoora Alohomora Alodoora Alomolock Reveal answer Fill a bubble to check yourself B Correct answer Explanation Alohomora is the standard unlocking charm - Hermione uses it throughout the series to open locked doors, including the third-floor corridor in Sorcerer's Stone. It's one of the most basic and useful utility charms in a wizard's repertoire.