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

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 using the reactivity series of metals.

### Step-by-step Solution:

1. **Understanding the Reactivity Series**: The reactivity series is a list of metals arranged in order of decreasing reactivity. Metals that are higher in the series can displace metals that are lower in the series from their compounds, including hydrogen from acids.

2. **Identifying Reactive Metals**:
- Metals that can displace hydrogen from dilute acids are those that are above hydrogen in the reactivity series.
...