Identify the wrong statement regarding copper sulphate `:`

Options

A. It reacts with KI to give `I_(2)`
B. It reacts with KCl to give `Cl_(2)`
C. It's tartarate complex reacts with NaOH and glucose to give `Cu_(2)O`
D. It gives CuO on strong heating in air

Answer

To identify the wrong statement regarding copper sulfate, let's analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement:** Copper sulfate reacts with potassium iodide (KI) to liberate iodine gas (I2).

**Analysis:**
When copper sulfate (CuSO4) reacts with potassium iodide (KI), the reaction can be represented as:
\[ \text{CuSO}_4 + 2 \text{KI} \rightarrow \text{Cu}_2\text{I}_2 + \text{I}_2 + \text{K}_2\text{SO}_4 \]

This indicates that iodine gas (I2) is indeed liberated during the reaction.

**Conclusion:** This statement is **correct**.

### Step 2: Analyze the second statement
**Statement:** Copper sulfate reacts with potassium chloride (KCl) to give chlorine gas (Cl2).

**Analysis:**
When copper sulfate reacts with potassium chloride, the reaction can be represented as:
\[ \text{CuSO}_4 + 2 \text{KCl} \rightarrow \text{CuCl}_2 + \text{K}_2\text{SO}_4 \]

In this reaction, chlorine gas (Cl2) is **not** produced.

**Conclusion:** This statement is **incorrect**.

### Step 3: Analyze the third statement
**Statement:** The tartrate complex of copper reacts with NaOH and glucose to give cuprous oxide (Cu2O).

**Analysis:**
The reaction of the tartrate complex of copper with NaOH and glucose can be represented as:
\[ \text{RCHO} + 2 \text{Cu}^{2+} + 5 \text{OH}^- \rightarrow \text{RCOO}^- + \text{Cu}_2\text{O} + 3 \text{H}_2\text{O} \]

This indicates that cuprous oxide (Cu2O) is indeed formed.

**Conclusion:** This statement is **correct**.

### Step 4: Analyze the fourth statement
**Statement:** Copper sulfate gives cupric oxide (CuO) on strong heating in air.

**Analysis:**
When copper sulfate is heated in air, it decomposes to form cupric oxide (CuO), sulfur dioxide (SO2), and oxygen (O2):
\[ 2 \text{CuSO}_4 \rightarrow 2 \text{CuO} + 2 \text{SO}_2 + \text{O}_2 \]

This indicates that cupric oxide (CuO) is indeed produced.

**Conclusion:** This statement is **correct**.

### Final Conclusion
The wrong statement regarding copper sulfate is:
- **It reacts with potassium chloride to give chlorine gas (Cl2).**