what is the difference between possessive pronoun andpossessive adjective
Here is an explanation of both which would make the difference between both of them clear.
Follow the mentioned link to get a clear cut concept about possessive pronoun:
Possessive Adjectives: The adjective which modifies the noun by attributing possession or characteristic feature to it is called a possessive adjective. This adjective shows who owns or possesses something. Instances of the same are: - my, your, his, her, its, our, their.