Asubstance that changes the rate of the reaction and is not consumed in the reaction 1 catalyst 2. a uniform mixture of molecules or ions of one substance in another solvent 3. the substance dissolved in a solution solute 4. the substance that does the dissolving in a solution 2 solution

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Answers:

A catalyst is a substance that changes the rate of the reaction, and is not consumed in the reaction!

A solution is a uniform mixture of molecules or ions of one substance in another!

A solute is the substance dissolved in a solution!

A solution is the substance that does the dissolving in a solution!

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Option (1) is the correct answer.

Explanation:

A catalyst is defined as the substance that helps in decreasing the activation energy of a chemical reaction so that more number of reactant molecules can participate in the reaction.

During this process the catalyst doesn't get consumed in the chemical reaction.

As a result, a catalyst also helps in increasing the rate of a chemical reaction.

Thus, we can conclude that a substance that changes the rate of the reaction and is not consumed in the reaction is known as a catalyst.