Which of the following statement(s) is/are not correct.

Options

A. The blue colour of aqueous `CuCl_(2)` is due to `[Cu(H_(2)O)_(4)]^(2+)`
B. The yellow colour of aqueous `CuCl_(2)` is due to `[CuCl_(4))]^(2-)`
C. The green colour of aqueous `CuCl_(2)` is due to `[CuCl_(2)]` is due to presence of both `[Cu(H_(2)O_(4))]^(2+)` and `[CuCl_(4)]^(2-)`
D. The blue colour of aqueous`CuCl_(2)` is due to `[CuCl_(4)]^(2-)`

Answer

To determine which of the statements regarding the colors of aqueous CuCl2 are not correct, let's analyze each statement step by step.

### Step 1: Analyze the First Statement
**Statement:** The blue color of aqueous CuCl2 is due to Cu(H2O)₄²⁺ ion.

**Analysis:** This statement is correct. When CuCl2 is dissolved in water, it forms a complex ion Cu(H2O)₄²⁺, which is responsible for the blue color of the solution.

### Step 2: Analyze the Second Statement
**Statement:** The yellow color of aqueous CuCl2 is due to CuCl₄²⁻ ion.

**Analysis:** This statement is also correct. In the presence of chloride ions, CuCl2 can form the complex ion CuCl₄²⁻, which imparts a yellow color to the solution.

### Step 3: Analyze the Third Statement
**Statement:** The green color of aqueous CuCl2 is due to the presence of both Cu(H2O)₄²⁺ and CuCl₄²⁻ ions.

**Analysis:** This statement is correct as well. The green color observed in the solution is due to the coexistence of both the blue Cu(H2O)₄²⁺ and yellow CuCl₄²⁻ ions, resulting in a greenish hue.

### Step 4: Analyze the Fourth Statement
**Statement:** The blue color of aqueous CuCl2 is due to CuCl₄²⁻ ion.

**Analysis:** This statement is incorrect. The blue color is not due to CuCl₄²⁻; instead, it is due to the Cu(H2O)₄²⁺ ion. The CuCl₄²⁻ ion gives a yellow color, not blue.

### Conclusion
Based on the analysis:
- The first three statements are correct.
- The fourth statement is not correct.

### Final Answer
The statement that is not correct is: **The blue color of aqueous CuCl2 is due to CuCl₄²⁻ ion.**

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