Question

why do copper sulphate lose shine when exposed to air?​

Answer 1

Answer:

A copper vessel reacts with oxygen present in air when exposed to it , they forms copper oxide which , in turn , is a black coating over the vessel and makes the vessel to lose its shine . The copper oxide which is formed is black in colour.

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Answer 2

Explanation:

A copper vessel reacts with oxygen present in air when exposed to it , they forms copper oxide which , in turn , is a black coating over the vessel and makes the vessel to lose its shine