Question

what is catalyst in chemistry

Answer 1

A catalyst is a substance that speeds up a chemical reaction, but is not consumed by the reaction; hence a catalyst can be recovered chemically unchanged at the end of the reaction it has been used to speed up, or catalyze.

Answer 2

Answer:

Catalyst is substance which increases or decreases the speed of a chemical reaction without itself undergoing any change.

When a catalyst accelerate the speed of the the reaction is called a positive catalyst.

On the other hand if the catalytic substance retards the chemical reaction it is called a negative catalyst.

Explanation:

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