Give suitable reasons for the following statements: A tarnished copper vessel regains its shine when rubbed with lemon.

Explanation

To explain why a tarnished copper vessel regains its shine when rubbed with lemon, we can break down the process into several steps:

### Step-by-Step Solution:

1. **Understanding Tarnishing**:
- When copper is exposed to air, it reacts with carbon dioxide (CO2), oxygen (O2), and moisture (water). This reaction leads to the formation of a greenish layer known as basic copper carbonate, which dulls the appearance of the copper vessel.

2. **Chemical Composition of Tarnish**:
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