Question

State Reasons-


(a) The shiny surface of some metals becomes dull when exposed to air for a long time.


(b) Metals like Calcium and Magnesium are never found in their free state in nature?

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Answer 1

Answer:

a) The shiny surface will become dull due to reaction with air to form metal oxide layer on the surface.

b) Metals like Calcium and Magnesium are highly reactive in nature. So they are not found in free state.

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