It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?

Explanation

To explain the difference in appearance between the old dull silver spoon and the lustrous gold earrings that Paheli received for her birthday, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Metals**: The two gifts are made of different metals: silver (the spoon) and gold (the earrings).

2. **Understand the Properties of Silver**: Silver is a metal that can tarnish when exposed to moisture and air over time. This tarnishing occurs due to a chemical reaction that forms a layer of silver sulfide on the surface, causing it to lose its shine and appear dull.

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