Question

Are catalysts substances that speed up chemical reaction by the activation energy required?

Answer 1

No..... Instead it's better to state that Catalysts are substances which alter i.e INCRESE SPEED OF REACTION the reaction speed but donot undergo any reaction or it itself doesnot participates in the reaction !

Answer 2

here is ur answer

Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism. Enzymes are proteins that act as catalysts in biochemical reactions.