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 are true regarding the exposure of silver chloride (AgCl) to sunlight, let's analyze each statement step by step.

### Step 1: Understanding the Reaction
When silver chloride (AgCl) is exposed to sunlight, it undergoes a photodecomposition reaction. The chemical equation for this reaction is:

\[ 2 \text{AgCl} \xrightarrow{\text{sunlight}} 2 \text{Ag} + \text{Cl}_2 \]

This means that silver chloride decomposes into silver (Ag) and chlorine gas (Cl₂).

### Step 2: Analyzing Each Statement
- **Statement (i): The formation of silver by decomposition of silver chloride.**
- This statement is true. As per the reaction, silver is formed when silver chloride decomposes.

- **Statement (ii): Sublimation of silver chloride.**
- This statement is false. Sublimation refers to a solid turning directly into a gas without becoming liquid. In this case, silver chloride does not sublimate; it decomposes into solid silver and chlorine gas.

- **Statement (iii): Decomposition of chlorine gas from silver chloride.**
- This statement is true. Chlorine gas is produced as a result of the decomposition of silver chloride.

- **Statement (iv): Oxidation of silver chloride.**
- This statement is false. The process involves the reduction of silver ions (Ag⁺) to metallic silver (Ag), which means that oxidation does not occur here.

### Conclusion
Based on the analysis:
- **True Statements:** (i) and (iii)
- **False Statements:** (ii) and (iv)

Thus, the correct answer is that statements (i) and (iii) are true.

### Final Answer
The true statements are:
- (i) The formation of silver by decomposition of silver chloride.
- (iii) Decomposition of chlorine gas from silver chloride.