The verb "hang" has two past participle forms. When referring to objects (like pictures), the form is "hung". When referring to execution (hanging a person), the form is "hanged".
১. "Hanged" is used specifically for the death penalty.
২. "Hunged" is an incorrect grammatical form.
৩. "Was hung" is the correct passive structure for a picture on a wall.
অতিরিক্ত তথ্য: Verbs with two different meanings often have distinct past forms.