Answer:
It decreases the amount of energy necessary for the reaction to proceed.
Explanation:
To be honest I saw it under the other person's comments when they put the wrong answer choice.
A catalyst is a substance which can change the chemical reaction rate but it itself remains chemically unchanged during the reaction. Thus, option A is correct.
A catalyst is involved in change of rate of reaction without changing its self. It can provide an alternative pathway by reducing the activation energy between reactant and product of a chemical reaction and lower the potential energy barrier.
The amount of energy needed to complete a chemical reaction called as activation energy, where catalyst only change the path of a reaction.
Catalyst does not change the equilibrium constant of a reaction and help in attaining equilibrium faster.
There are two types of catalyst such as negative catalyst which decrease the rate of reaction and positive catalyst increase the rate of reaction. Hence option A is correct.
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