Which among the following statement (s) is /are true? Exposure of silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride.
(ii) sublimation of silver chloride.
(iii) decomposition of chlorine gas from silver chloride.
(iv) oxidation of silver chloride.

Options

A. (i) Only
B. `(i) and (iii)`
C. `(ii) and (iii)`
D. Only (iv)

Explanation

To determine which statements regarding the exposure of silver chloride (AgCl) to sunlight are true, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Understanding the Reaction**:
When silver chloride (AgCl) is exposed to sunlight for a prolonged period, it undergoes a photochemical reaction. The equation for this reaction is:
\[ 2 \text{AgCl} \xrightarrow{\text{sunlight}} 2 \text{Ag} + \text{Cl}_2 \]
This indicates that silver chloride decomposes into silver (Ag) and chlorine gas (Cl₂).

**Hint**: Remember that photochemical reactions often involve the decomposition of compounds under light.

2. **Analyzing Statement (i)**:
The first statement claims that the formation of silver by decomposition of silver chloride is true. Based on our understanding of the reaction, this statement is indeed correct.

**Hint**: Look for evidence of products formed in the reaction when analyzing statements.

3. **Analyzing Statement (ii)**:
The second statement suggests sublimation of silver chloride. Sublimation refers to the transition of a substance from solid to gas without passing through the liquid phase. In the case of silver chloride, it does not sublime; instead, it decomposes into silver and chlorine gas. Therefore, this statement is false.

**Hint**: Consider the state changes of substances when evaluating sublimation.

4. **Analyzing Statement (iii)**:
The third statement mentions the decomposition of chlorine gas from silver chloride. While chlorine gas is produced during the decomposition of silver chloride, the statement is misleading as it implies that chlorine gas is decomposed from silver chloride rather than being a product of its decomposition. Thus, this statement is also false.

**Hint**: Pay attention to the wording of statements to determine if they accurately describe the process.

5. **Analyzing Statement (iv)**:
The fourth statement claims oxidation of silver chloride. In the reaction, silver chloride is not oxidized; rather, silver ions (Ag⁺) are reduced to metallic silver (Ag), and chlorine gas (Cl₂) is formed. Therefore, this statement is false.

**Hint**: Review the definitions of oxidation and reduction to clarify the processes occurring in the reaction.

### Conclusion:
After analyzing all the statements, we find that only the first statement is true. Therefore, the correct answer is:

**True Statement**: (i) the formation of silver by decomposition of silver chloride.

### Summary of True/False Statements:
- (i) True
- (ii) False
- (iii) False
- (iv) False