It is experimentally found that a catalyst is used to:
Correct answer: A. Lower the activation energy
- A. Lower the activation energy
- B. Increase the activation energy
- C. Lower the pH
- D. Decrease the temp of the reaction
Explanation
A catalyst reduces the activation energy of a chemical reaction by providing an alternate route.
This question appeared on the UHS MDCAT 2011 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Activation Energy and Activated Complex
Activation energy is the minimum energy reactant particles need to form the activated complex, or transition state, during a reaction. Energy profile diagrams show the forward and reverse activation energies, while catalysts provide an alternative pathway with lower activation energy without changing the reaction enthalpy.
Practise Reaction Kinetics
573 free Reaction Kinetics MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Activation Energy and Activated Complex questions
Reaction intermediate:
The minimum energy below which no reaction occur in reactant molecules is:
Anything which increases rate of reaction without being involved in the reaction________________?
What does the Arrhenius equation explain?
In transition state, the reactants are:
The addition of a catalyst to a chemical reaction changes: