Which metal appears dull

1.	Which metal appears dull
Answer» ANSWER: Metals GENERALLY appear to be dull because of the reaction of them with moisture of AIR. Their brightness can be restored by rubbing with shining PAPER.

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Metals GENERALLY appear to be dull because of the reaction of them with moisture of AIR. Their brightness can be restored by rubbing with shining PAPER.

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Which metal appears dull​

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Which metal appears dull