In which of the following reactions, reaction of silver with the given acids lead to the formation of compound of silver, along with liberation of gas?

Options

A. `Ag+"dilute "HNO_(3)`
B. `Ag+conc." "HNO_(3)`
C. `Ag+"conc. "H_(2)SO_(4)`
D. All of these.

Explanation

To determine in which reactions silver reacts with the given acids to form a compound of silver along with the liberation of gas, we will analyze each option step by step.

### Step 1: Analyze the first option - Silver and dilute nitric acid
- **Reaction**:
\[ \text{Ag} + \text{HNO}_3 \text{(dilute)} \rightarrow \text{AgNO}_3 + \text{NO} + \text{H}_2\text{O} \]
- **Products**: Silver nitrate (AgNO3) and nitric oxide (NO) gas.
- **Conclusion**: This reaction produces a compound of silver and liberates a gas.

### Step 2: Analyze the second option - Silver and concentrated nitric acid
- **Reaction**:
\[ \text{Ag} + \text{HNO}_3 \text{(concentrated)} \rightarrow \text{AgNO}_3 + \text{NO}_2 + \text{H}_2\text{O} \]
- **Products**: Silver nitrate (AgNO3) and nitrogen dioxide (NO2) gas.
- **Conclusion**: This reaction also produces a compound of silver and liberates a gas.

### Step 3: Analyze the third option - Silver and concentrated sulfuric acid
- **Reaction**:
\[ 2\text{Ag} + 2\text{H}_2\text{SO}_4 \rightarrow \text{Ag}_2\text{SO}_4 + \text{SO}_2 + 2\text{H}_2\text{O} \]
- **Products**: Silver sulfate (Ag2SO4) and sulfur dioxide (SO2) gas.
- **Conclusion**: This reaction produces a compound of silver and liberates a gas.

### Step 4: Analyze the fourth option - Conclusion
- All three reactions (with dilute nitric acid, concentrated nitric acid, and concentrated sulfuric acid) result in the formation of a silver compound and the liberation of gas. Therefore, the correct answer is that all the reactions satisfy the condition given in the question.

### Final Answer:
All of the above reactions lead to the formation of a compound of silver along with the liberation of gas.