`S+HNO_(3)(Dil.) to H_(2)SO_(4)+Nouarr`

Options

A. For disproportionation reaction.
B. For comproportionation reaction.
C. For either intermolecular redox reaction or displacement reaction
D. For either thermal combination redox reaction or thermal decomposition redox reaction.

Answer

To determine the type of reaction represented by the equation \( S + HNO_3 \rightarrow H_2SO_4 + NO \), we will analyze the oxidation states of the elements involved in the reaction.

### Step 1: Write the balanced chemical equation
The given reaction is:
\[ S + HNO_3 \rightarrow H_2SO_4 + NO \]

### Step 2: Assign oxidation states
- **Sulfur (S)** in its elemental form has an oxidation state of **0**.
- In **HNO3**:
- Hydrogen (H) has an oxidation state of **+1**.
- Oxygen (O) has an oxidation state of **-2**.
- Let the oxidation state of Nitrogen (N) be \( x \):
\[ +1 + x + 3(-2) = 0 \implies 1 + x - 6 = 0 \implies x = +5 \]
So, Nitrogen in HNO3 has an oxidation state of **+5**.

- In **H2SO4**:
- Hydrogen (H) has an oxidation state of **+1**.
- Oxygen (O) has an oxidation state of **-2**.
- Let the oxidation state of Sulfur (S) be \( y \):
\[ 2(+1) + y + 4(-2) = 0 \implies 2 + y - 8 = 0 \implies y = +6 \]
So, Sulfur in H2SO4 has an oxidation state of **+6**.

- In **NO**:
- Let the oxidation state of Nitrogen (N) be \( z \):
\[ z + (-2) = 0 \implies z = +2 \]
So, Nitrogen in NO has an oxidation state of **+2**.

### Step 3: Analyze changes in oxidation states
- **Sulfur (S)** changes from **0** (in S) to **+6** (in H2SO4) - this is an **oxidation** process.
- **Nitrogen (N)** changes from **+5** (in HNO3) to **+2** (in NO) - this is a **reduction** process.

### Step 4: Determine the type of reaction
Since both oxidation and reduction are occurring simultaneously in this reaction, it is classified as a **redox reaction**. More specifically, because the oxidation and reduction involve different substances, it is an **intermolecular redox reaction**.

### Final Answer
The type of reaction represented by \( S + HNO_3 \rightarrow H_2SO_4 + NO \) is an **intermolecular redox reaction**.

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