Which of the following processes give sulphur ?

Options

A. `H_(2)S` gas is passed through nitric acid
B. `H_(2)S` gas is passed through `Cl_(2)` gas
C. `H_(2)S` gas is passed through sodium bisulphite
D. `H_(2)S` gas is passed through `SO_(2)` gas

Answer

To determine which processes give sulfur, we will analyze each of the provided processes step by step.

### Step 1: Analyze the first process
**Process:** Hydrogen sulfide gas (H₂S) passes through nitric acid (HNO₃).

**Reaction:**
\[ \text{H}_2\text{S} + 2 \text{HNO}_3 \rightarrow 2 \text{NO}_2 + 2 \text{H}_2\text{O} + \text{S} \]

**Conclusion:** Sulfur is produced in this reaction.

### Step 2: Analyze the second process
**Process:** Hydrogen sulfide gas (H₂S) is passed through chlorine gas (Cl₂).

**Reaction:**
\[ \text{H}_2\text{S} + \text{Cl}_2 \rightarrow 2 \text{HCl} + \text{S} \]

**Conclusion:** Sulfur is produced in this reaction.

### Step 3: Analyze the third process
**Process:** Hydrogen sulfide gas (H₂S) is passed through sodium bisulfite (NaHSO₃).

**Reaction:**
\[ \text{H}_2\text{S} + \text{NaHSO}_3 \rightarrow \text{Na}_2\text{SO}_3 + \text{H}_2\text{O} + \text{S} \]

**Conclusion:** Sulfur is produced in this reaction.

### Step 4: Analyze the fourth process
**Process:** Hydrogen sulfide gas (H₂S) is passed through sulfur dioxide gas (SO₂).

**Reaction:**
\[ \text{H}_2\text{S} + \text{SO}_2 \rightarrow 2 \text{H}_2\text{O} + \text{S} \]

**Conclusion:** Sulfur is produced in this reaction.

### Final Conclusion
All four processes result in the production of sulfur. Therefore, the correct answer is that all the processes give sulfur.

### Summary of the Answer
The processes that give sulfur are:
1. Hydrogen sulfide gas passes through nitric acid.
2. Hydrogen sulfide gas is passed through chlorine gas.
3. Hydrogen sulfide gas is passed through sodium bisulfite.
4. Hydrogen sulfide gas is passed through sulfur dioxide gas.