Catalyst Effect
Easychemistry
A catalyst increases rate by:
Select the correct option:
Solution
Incorrect! Answer:
Lowering activation energy
- Function of Catalyst: A substance that increases the rate of reaction by providing an alternative mechanism with a significantly lower activation energy (Eaā).
- Energy Profile: The catalyst reduces the height of the energy hill between reactants and products.
- Equilibrium: It increases the rate of both forward and backward reactions equally. Thus, it does not change the equilibrium constant (K) or the state of equilibrium.
- Thermodynamics: It does not alter ĪGā, ĪHā, or the final concentrations (yield).
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About This Question
- Subject
- chemistry
- Chapter
- chemical kinetics
- Topic
- catalyst effect
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Lowering activation energy
- Function of Catalyst: A substance that increases the rate of reaction by providing an alternative mechanism with a significantly lower activation energy (Eaā).
- Energy Profile: The catalyst reduces the height of the energy hill between reactants and products.
- Equilibrium: It increases the rate of both forward and backward reactions equally. Thus, it does not change the equilibrium constant (K) or the state of equilibrium.
- Thermodynamics: It does not alter ĪGā, ĪHā, or the final concentrations (yield).
This easy difficulty chemistry question is from the chapter chemical kinetics, covering the topic of catalyst effect. It appeared in the 2025 exam.
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