alleryStart learning →The development of a black coating on silver articles left in air is an example of
Arusting
Brancidity
Ccorrosion
Dreduction
Answer & Solution
Correct answer: C. corrosion
1. Silver reacts slowly with sulphur compounds in air to form black silver sulphide.
2. This slow attack of a metal by its surroundings is **corrosion**.
3. Rusting is corrosion specific to iron; rancidity affects fats, not metals.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch1 'Chemical Reactions and Equations', §1.4_
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