Promoters are substances which increases the efficiency of catalyst.T or F

Answer

To determine whether the statement "Promoters are substances which increase the efficiency of catalysts" is true or false, we can follow these steps:

### Step 1: Understand the Definition of a Catalyst
A catalyst is a substance that increases the rate of a chemical reaction without undergoing any permanent change itself. It achieves this by lowering the activation energy required for the reaction.

**Hint:** Recall that catalysts remain unchanged after the reaction and only facilitate the reaction process.

### Step 2: Define Promoters
Promoters are substances that are added in small amounts to catalysts to enhance their effectiveness. They do not act as catalysts themselves but improve the performance of the catalyst.

**Hint:** Think of promoters as helpers that boost the capabilities of catalysts.

### Step 3: Analyze the Relationship Between Promoters and Catalysts
Since promoters enhance the efficiency of catalysts, they play a crucial role in increasing the rate of reaction when used alongside catalysts.

**Hint:** Consider examples from industrial processes where promoters are used with catalysts.

### Step 4: Provide an Example
In the Haber process for synthesizing ammonia, iron (Fe) is used as a catalyst, and molybdenum is used as a promoter. Molybdenum increases the efficiency of the iron catalyst.

**Hint:** Remember that specific examples can help solidify your understanding of concepts.

### Step 5: Conclusion
Since promoters indeed increase the efficiency of catalysts, the statement is true.

**Final Answer:** True.