`Na(s)+H_(2)O(l) overset(R.T.) to NaOH +H_(2) uarr`

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 analyze the reaction \( \text{Na(s)} + \text{H}_2\text{O(l)} \rightarrow \text{NaOH} + \text{H}_2 \), we need to determine the type of reaction it represents. Let's break it down step by step.

### Step 1: Identify the Reactants and Products
The reactants are sodium (Na) in solid form and water (H₂O) in liquid form. The products are sodium hydroxide (NaOH) and hydrogen gas (H₂).

**Hint:** Always start by identifying the reactants and products in a chemical reaction.

### Step 2: Determine the Oxidation States
- For sodium (Na) in its elemental form, the oxidation state is 0.
- In water (H₂O), the oxidation state of hydrogen is +1, and oxygen is -2.
- In sodium hydroxide (NaOH), sodium has an oxidation state of +1, and in hydrogen gas (H₂), the oxidation state of hydrogen is 0.

**Hint:** Calculate the oxidation states of elements in both reactants and products to identify changes.

### Step 3: Analyze the Changes in Oxidation States
- Sodium (Na) goes from an oxidation state of 0 to +1 in NaOH, indicating that it is oxidized (loses electrons).
- The hydrogen in water (H₂O) goes from +1 to 0 in H₂, indicating that it is reduced (gains electrons).

**Hint:** Look for elements that undergo oxidation (increase in oxidation state) and reduction (decrease in oxidation state).

### Step 4: Classify the Reaction
Since we have both oxidation and reduction occurring simultaneously, this reaction is classified as a redox reaction. Specifically, it is an intermolecular redox reaction because the oxidation and reduction processes are occurring between different molecules (Na and H₂O).

**Hint:** If both oxidation and reduction occur in a reaction, it is a redox reaction. Determine if it is intra- or intermolecular based on the species involved.

### Conclusion
The reaction \( \text{Na(s)} + \text{H}_2\text{O(l)} \rightarrow \text{NaOH} + \text{H}_2 \) is classified as an **intermolecular redox reaction**.

**Final Answer:** C) Intermolecular redox reaction.