Select the `pK_(a)` value of the strongest acid from the following

Options

A. `1.0`
B. `3.0`
C. `2.0`
D. 4.5

Explanation

To determine the pKa value of the strongest acid from the given options (1, 2, 3, 4.5), we need to understand the relationship between pKa values and acid strength.

### Step-by-Step Solution:

1. **Understand pKa Values**:
- pKa is a measure of the strength of an acid in solution. The lower the pKa value, the stronger the acid.
- Strong acids have pKa values that are typically less than 0, while weak acids have higher pKa values.

2. **Analyze the Given Options**:
- The options provided are: 1, 2, 3, and 4.5.
- These values represent the pKa values of different acids.

3. **Compare the pKa Values**:
- Among the given values, 1 is the lowest, followed by 2, then 3, and finally 4.5.
- Since the strongest acid will have the lowest pKa value, we can conclude that the strongest acid corresponds to the lowest pKa value.

4. **Identify the Strongest Acid**:
- Therefore, the strongest acid among the given options is the one with a pKa of 1.

5. **Conclusion**:
- The pKa value of the strongest acid from the options provided is **1**.