Read the given passage and answer the questions.
The physical states of the reactants and products can be represented by using the symbols (s) for solids, (l) for liquids, (g) for gases and (aq) for aqueous solution along with their respective formulae. The word aqueous is written if the reactant or product is present as a solution in water. Precipitate can also be represented by using an arrow pointing downwards `(darr)` instead of using symbol (s).
In the same way, the gaseous state of an evolved gas can be represented by using an arrow pointing upward direction `(uarr)` instead of using symbol (g). The specific condition of the reaction like temperature, pressure, catalyst etc. is written above or below the arrow in the chemical equation.
Complete the missing variable given as X and Y in the following reaction:
`2Na(s) +2H_(2)O (l) to 2NaOH (X) +H_(2)(Y)`

Options

A. (aq) and (g)
B. (s) and (g)
C. (g) and (l)
D. (g) and (aq)

Explanation

To solve the problem, we need to identify the missing variables X and Y in the chemical reaction given:

**Reaction:**
\[ 2Na(s) + 2H_2O(l) \rightarrow 2NaOH(X) + H_2(Y) \]

### Step 1: Identify the physical states of the reactants
- Sodium (Na) is a solid, represented by (s).
- Water (H₂O) is a liquid, represented by (l).

### Step 2: Determine the product formed from the reaction
- Sodium reacts with water to form sodium hydroxide (NaOH) and hydrogen gas (H₂).
- Sodium hydroxide is typically formed in an aqueous solution when dissolved in water.

### Step 3: Assign the physical state to NaOH
- Since NaOH is formed in a reaction with water, it will be in an aqueous state. Therefore, we can represent it as (aq).
- Thus, we can conclude that X = (aq).

### Step 4: Identify the physical state of the evolved gas
- Hydrogen gas (H₂) is evolved during the reaction, which is in a gaseous state.
- Therefore, we can represent it as (g).
- Thus, we can conclude that Y = (g).

### Final Answer:
- X = (aq) (aqueous solution)
- Y = (g) (gas)

### Summary of the completed reaction:
\[ 2Na(s) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2(g) \]

---