Question

a chemical reaction which is slow in the beginning and speed up after some time is called​

Answer 1

Answer:Reactions usually slow down as time goes on because of the depletion of the reactants. In some cases the addition of a substance that is not itself a reactant, called a catalyst, accelerates a reaction.

Explanation:

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Answer 2

Explanation:

I think the question is incomplete it may be asking about the substance which speeds up the reaction