To parse interrogative pronouns:

Tell that it is an interrogative pronoun and explain why.
Give the pronoun’s antecedent.
Explain why it is the antecedent.
Give the person, number, gender and explain why.

Parse the interrogative pronouns in the following sentence:

Who shall separate us from the love of our God?

Who is a pronoun.
It is an interrogative pronoun.
Its antecedent is not expressed.
Its nominative case is who.
Its possessive case is whose
Its objective case is whom.
It is in the nominative case and is used as the subject of the proposition, who shall separate.

Parse the interrogative pronouns in the following sentence:

Whose books have you found?

Whose is a pronoun.
It is an interrogative pronoun.
Its antecedent is not expressed.
It is in the possessive case and is used to limit the noun book by denoting possession.

Parse the interrogative pronouns in the following sentence:

What seek ye?

What is a pronoun.
It is an interrogative pronoun.
It is in the objective case and used as the object of the verb seek.

Parse the interrogative pronouns in the following sentence:

What lesson shall we learn?

What is a pronominal adjective used interrogatively.

Parse the interrogative pronouns in the following sentence:

I do not know who is there.

Who is an indefinite interrogative pronoun having properly no antecedent, but referring to some unknown person.
It is also a subordinate connective.
It joins the subordinate proposition, Who is there to the proposition I know.