True and False about Rate of Chemical Reaction?

Which of the following changes will usually increase the rate of a chemical reaction.





1. decrease the temperature


2. double the size of the reaction vessel


3. add a catalyst


4. subdivide a solid reactant into smaller particles


5. increase the pressure on a gas phase reaction








:DTrue and False about Rate of Chemical Reaction?
All of those.





But I have to point out number 3. Because a Positive catalyst will make the reaction go faster. A Negative catalyst will slow down a reaction.