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Question

The process in which metal surface is made inactive is called:

A
passivation
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B
galvanising
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C
corrosion
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D
pickling
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Solution

The correct option is A passivation
The process in which metal surface is made inactive is called passivation. In this process metal is treated with a strong oxidising agents such as concentrated nitric acid. It prevents from rust.
So answer is A.

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