White silver chloride in sunlight turns to

Options

A. grey
B. yellow
C. red
D. none of these.

Explanation

**Step-by-Step Solution:**

1. **Identify the Substance**: The substance in question is silver chloride, which is represented by the chemical formula AgCl. It is known to be white in color.

2. **Understand the Effect of Sunlight**: The question states that white silver chloride is exposed to sunlight. We need to determine what happens to silver chloride when it is subjected to sunlight.

3. **Write the Chemical Reaction**: When silver chloride (AgCl) is exposed to sunlight, it undergoes a photochemical reaction. The reaction can be represented as:
\[ 2 \text{AgCl} \xrightarrow{\text{sunlight}} 2 \text{Ag} + \text{Cl}_2 \]
In this reaction, silver chloride decomposes to form metallic silver (Ag) and chlorine gas (Cl₂).

4. **Balance the Reaction**: The reaction is balanced as written, with two moles of silver chloride producing two moles of silver and one mole of chlorine gas.

5. **Determine the Color Change**: The metallic form of silver (Ag) is gray in color. Therefore, as silver chloride decomposes in sunlight, the white color of AgCl changes to the gray color of metallic silver.

6. **Conclusion**: The color change observed when white silver chloride is exposed to sunlight is to gray.

**Final Answer**: White silver chloride in sunlight turns to gray.

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