Which of the following is an Arrhenius acid ?

Options

A. `NH_(3)`
B. `SO_(2)`
C. `AICI_(3)`
D. `HNO_(3)`

Answer

To determine which of the given options is an Arrhenius acid, we will follow these steps:

### Step 1: Understand the Definition of Arrhenius Acid
An Arrhenius acid is defined as a substance that, when dissolved in water, increases the concentration of hydrogen ions (H⁺) in the solution. This means that an Arrhenius acid must dissociate in aqueous solution to produce H⁺ ions.

### Step 2: Analyze the Given Options
We need to evaluate the options provided (though not explicitly listed in the question) to identify which one produces H⁺ ions when dissolved in water.

### Step 3: Identify the Correct Option
Among the options, we will look for a substance that ionizes in water to release H⁺ ions.

- If one of the options is HNO₃ (nitric acid), we can analyze it:
- HNO₃ dissociates in water as follows:
\[ \text{HNO}_3 \rightarrow \text{H}^+ + \text{NO}_3^- \]
- This reaction shows that HNO₃ produces H⁺ ions, thus increasing the concentration of H⁺ in the solution.

### Step 4: Conclusion
Based on the analysis, the only substance that qualifies as an Arrhenius acid among the options is HNO₃ (nitric acid).

### Final Answer
The Arrhenius acid from the given options is **HNO₃ (nitric acid)**.

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