Does Chloe find out Clark’s secret again?

After unintentionally following Clark to the Fortress of Solitude, Chloe knew that there was more to his secret than she realized. After saving Chloe from freezing to death in the Fortress, Clark finally told Chloe everything in the season 5 premiere — and from then on, she served as Clark’s closest ally.

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How did Chloe find out about Clark’s powers?

When and how did Chloe find out about Clark being an alien? She finds out he has superpowers in the episode Pariah (2005) (Season 4, episode 12). A meteor freak called Alicia Baker who was in a relationship with Clark, and assumed he was exposed to meteor rocks too, is framed for crimes she did not commit.