Question: what pqs give dragon balls?
Answer: PQ 4: Prepare for the Attack of Saiyans! ( spawns after you beat everybody in the first area)
PQ 7: Attack of the Saiyans.
PQ 11: Burst Open and Mix!
PQ 19: Fierce Battle! ... 
PQ 23: The Explosion of Namek (Spawns after you beat frieza)