Paris green was used as a pigment due to unique light green colour but now-a-days it is used as an insecticide. It is prepared by boiling verdigris (basic acetate of copper). Arsenious oxide and acetic acid together. It is

Options

A. `(CH_3COO)_2 Cu.3Cu(AsO_2)_2`
B. Curpric acetoarsenite
C. `Cu_4(CH_3COO)_2(AsO_2)_2`
D. All

Answer

To solve the question regarding Paris green and its structure, we will follow these steps:

### Step 1: Identify the Components
Paris green is a compound made from verdigris (basic acetate of copper), arsenious oxide, and acetic acid. We need to identify the chemical components involved in its formation.

**Hint:** Look for the main ingredients mentioned in the question and their chemical identities.

### Step 2: Understand the Chemical Reaction
The reaction involves boiling verdigris, arsenious oxide, and acetic acid together. This implies a chemical reaction where these components combine to form Paris green.

**Hint:** Consider how each component contributes to the final product.

### Step 3: Determine the Chemical Formula
Paris green is known as cupric acetoarsenite. The chemical formula can be derived from the components:
- Verdigris contributes copper (Cu).
- Arsenious oxide contributes arsenic (As).
- Acetic acid contributes acetate ions (C2H3O2).

The overall formula can be represented as:
\[ \text{Cu}_3(\text{AsO}_3)(\text{C}_2\text{H}_3\text{O}_2)_2 \]

**Hint:** Pay attention to the stoichiometry of the components when writing the formula.

### Step 4: Draw the Structure
To visualize Paris green, we need to draw its structure. The structure consists of:
- Copper ions (Cu²⁺) coordinated with acetate ions.
- Arsenic oxide (AsO₃) as part of the structure.

The structure can be represented as:
- Three copper ions connected to two acetate ions and one arsenite ion.

**Hint:** Use Lewis structures to represent the coordination of copper with acetate and arsenite.

### Step 5: Conclusion
The final structure of Paris green (cupric acetoarsenite) can be summarized as a complex of copper, arsenic, and acetate ions.

**Hint:** Review the final structure to ensure all components are correctly represented.

### Final Answer
Paris green is cupric acetoarsenite, with the formula \[ \text{Cu}_3(\text{AsO}_3)(\text{C}_2\text{H}_3\text{O}_2)_2 \].