In the following sequence of recation, identify the compounds (A), (B), (C ) and (D):
`underset("Solution")Na_(2)CO_(3)overset(SO_(2))rarr (A) overset(Na_(2)CO_(3))rarr (B) overset(S)underset("Heat")rarr (C ) overset(AgNO_(3))rarr (D)`

Options

A. `NaSO_(3).NaHSO_(3).Na_(2)s.Ag_(2)S`
B. `NaHSO_(3), Na_(2)SO_(3),Na_(2)S_(2)O_(3),Ag_(2)S`
C. `NaHSO_(3),Na_(2)SO_(4),Na_(2)S,Ag_(2)O`
D. `Na_(2)SO_(3),Na_(2)SO_(4),Na_(2)S_(2)O_(3),Ag`

Explanation

To solve the problem, we need to identify the compounds (A), (B), (C), and (D) in the given sequence of reactions involving sodium carbonate (Na₂CO₃) and sulfur dioxide (SO₂).

### Step-by-Step Solution:

1. **Identify Compound A:**
- The first reaction involves sodium carbonate (Na₂CO₃) reacting with sulfur dioxide (SO₂).
- The reaction can be represented as:
\[ \text{Na}_2\text{CO}_3 + \text{SO}_2 + \text{H}_2\text{O} \rightarrow 2 \text{NaHSO}_3 + \text{CO}_2 \]
- Thus, compound (A) is **Sodium bisulfite (NaHSO₃)**.

2. **Identify Compound B:**
- Next, we add sodium carbonate (Na₂CO₃) to compound (A):
\[ 2 \text{NaHSO}_3 + \text{Na}_2\text{CO}_3 \rightarrow 2 \text{Na}_2\text{SO}_3 + \text{H}_2\text{O} + \text{CO}_2 \]
- Therefore, compound (B) is **Sodium sulfite (Na₂SO₃)**.

3. **Identify Compound C:**
- Now, we heat compound (B) with sulfur (S):
\[ \text{Na}_2\text{SO}_3 + \text{S} \rightarrow \text{Na}_2\text{S} + \text{SO}_2 \]
- This reaction produces **Sodium sulfide (Na₂S)**, which is compound (C).

4. **Identify Compound D:**
- Finally, we react compound (C) with silver nitrate (AgNO₃):
\[ \text{Na}_2\text{S} + 2 \text{AgNO}_3 \rightarrow 2 \text{Ag}_2\text{S} + 2 \text{NaNO}_3 \]
- Thus, compound (D) is **Silver sulfide (Ag₂S)**.

### Summary of Compounds:
- (A) = Sodium bisulfite (NaHSO₃)
- (B) = Sodium sulfite (Na₂SO₃)
- (C) = Sodium sulfide (Na₂S)
- (D) = Silver sulfide (Ag₂S)