Which of two : cuprous chloride or cupric chloride is coloured and why?

Explanation

To determine which of the two compounds, cuprous chloride (CuCl) or cupric chloride (CuCl₂), is colored and to explain why, we can follow these steps:

### Step 1: Identify the oxidation states of copper in both compounds.
- **Cuprous chloride (CuCl)** contains copper in the +1 oxidation state.
- **Cupric chloride (CuCl₂)** contains copper in the +2 oxidation state.

### Step 2: Write the electronic configuration of copper.
- The atomic number of copper (Cu) is 29. Its electronic configuration is:
...