Which will increase the rate of a chemical reaction?

a) adding a positive catalyst

b) decreasing the pressure

c) decreasing the temperature

d)adding a negative catalyst

The correct answer is- A) adding a positive catalyst.

A positive catalyst is a substance that helps in increasing the rate of a chemical reaction by decreasing the activation energy ( minimum amount energy, which is required for a chemical reaction to occur)  of the the reaction.

Therefore, by adding a positive catalyst, the rate of chemical reaction is increased.

Thus, option A) is the right answer.

A positive catalyst will increase the rate of a chemical reaction

A positive catalyst is a catalyst that is used to accelerate the reaction.

The catalyst makes activation energy more lace

There are several factors that influence reaction kinetics, namely:

1. Concentration

the greater the concentration of the reactants, the faster the reaction will be

2. Surface area

the more surface area of ​​the reaction substance is faster

3. Temperature

at higher temperatures the rate of chemical reactions is faster

4. Catalyst

catalyst increases reaction speed

5. Pressure

an increase in pressure will reduce the volume, so the number of collisions between molecules is greater because the distance between molecules is more close together, so that in the end the reaction takes place faster

6. Stirring

stirring can enlarge the surface area and accelerate collisions

If we see the answer choices that exist then

a. positive catalyst and d. negative catalyst

B. Decreasing pressure

lowering the pressure causes the volume to grow so that the collision between the particles decreases, so the reaction takes place more slowly

C. Decreasing temperature

lowering the temperature makes the reaction rate run slower, because temperature is related to kinetic energy, heating makes kinetic energy increase and particle collisions occur more often because particles move faster

So the correct answer is A. add a positive catalyst

the rate of a reaction

the rate of a reaction can be increased

Endothermic and exothermic reactions

the rate of a reaction can be increased2

i believe it would be c: tons.