Possessive Adjective and Pronouns

Possessive Adjectives : always followed by its nound.
: my, your, his, her , its, our, your, their

Possessive Pronouns : never followed by its nound.
: mine, yours, his, hers, - , ours, yours, theirs

Example:
Possessive adjective: That's is my mother.
Possessive Pronouns : This had is mine.

Reference: Grammar Practice for Pre-Intermediate Students.