Greenish layer appears on the copper utensils if they are not cleaned for a few days. Give reason. [2 MARKS]

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Solution

Explanation: 2 Marks

1. Copper metal slowly reacts with water, carbon dioxide and oxygen present in air to form a layer of basic copper carbonate which is greenish in colour.
2. This layer gets deposited on the surface of the copper utensils if they are not cleaned for a few days.

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