Question

1. This is where I live.
2. Tell me where he lives.
3. Will you tell me why he was late.
4. Do you know how he solved the problem.
5. I remember when he arrived.
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There are where, why, how, when in the sentences. Which ones are relative adverbs? And which ones are interrogative adverbs?
1. where -
2. where -
3. why -
4. how -
5. when -

Answer 1

All are interrogative pronouns; read about interrogative pronouns here:
http://grammar.ccc.commnet.edu/grammar/pronouns1.htm#interrogative

None of the words you listed are relative pronouns. Read about relative pronouns here:
http://grammar.ccc.commnet.edu/grammar/pronouns1.htm#relative