On electrolysis of copper chloride, copper is deposited at the cathode,which forms a _________layer on the cathode.

Options

A. blackish
B. reddish
C. whitish
D. bluish

Answer

To answer the question regarding the electrolysis of copper chloride (CuCl2) and the color of the layer formed at the cathode, we can follow these steps:

### Step-by-step Solution:

1. **Understanding Electrolysis**:
- Electrolysis involves the decomposition of a substance through the application of an electric current. In this case, we are dealing with copper chloride (CuCl2) as the electrolyte.

2. **Identifying the Electrodes**:
- During electrolysis, two electrodes are used: the cathode (negative electrode) and the anode (positive electrode). Copper ions (Cu²⁺) migrate towards the cathode where they gain electrons and are reduced to form solid copper.

3. **Observing the Reaction at the Cathode**:
- At the cathode, the reaction can be represented as:
\[ \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu (s)} \]
- This indicates that copper ions are being deposited as solid copper on the cathode.

4. **Determining the Color of Copper**:
- The deposited copper has a characteristic color. Pure copper is known to have a reddish-brown color. When it is deposited at the cathode, it forms a layer that retains this color.

5. **Conclusion**:
- Therefore, the layer formed on the cathode during the electrolysis of copper chloride is a **reddish** layer.

### Final Answer:
The correct answer is: **reddish**.

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