What is the effect of catalyst on activation energy ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Activation Energy (Ea):**
- Activation energy is the minimum energy required for a chemical reaction to occur. It is the energy barrier that reactants must overcome to be converted into products.

2. **Role of a Catalyst:**
- A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. It achieves this by providing an alternative pathway for the reaction with a lower activation energy.

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