Name two metals which will displace hydrogen from dilute acids, and two metals which will not displace hydrogen from dilute acids.

Explanation

To answer the question, we need to identify two metals that can displace hydrogen from dilute acids and two metals that cannot. This can be determined by referring to the reactivity series of metals.

### Step-by-Step Solution:

1. **Understanding the Reactivity Series**:
- The reactivity series is a list that ranks metals based on their ability to displace other elements from compounds. Metals that are higher in the series are more reactive and can displace metals that are lower in the series.

2. **Identifying Metals that Displace Hydrogen**:
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