increases the rate of the reaction
decreases the rate of reaction
has no action on the rate of the reaction
none of the above
Answer is Wrong!
Answer is Right!
The correct
answer is A. A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.Option B is incorrect because a catalyst increases the rate of a reaction, not decreases it.
Option C is incorrect because a catalyst does have an effect on the rate of a reaction, it just doesn’t undergo any permanent chemical change
itself.Option D is incorrect because a catalyst does exist and does have the effect described in option A.