Chemistry, asked by tanishasinha8539, 1 year ago

Why a old coin appears dull?

Answers

Answered by PrernaR

1

The surface of the coin is exposed to oxygen in the atmosphere. Thus it's surface gets oxidized and hence turns dull over time.

Answered by jennydhanuka

2

old coin appears dull because Old coins develop a very thin surface layer of dirt and oxides

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