Chemistry, asked by narendraysn818, 1 year ago

Which metal when exposed to air forms a black coating?

Answers

Answered by navi349

0

Answer:

Iron forms iron oxide or rust on exposure with moist air.

Answered by s6b1548shlok7264

0

Answer:

silver

Explanation:

it reacts with sulphur in air and make silver sulphide which is black in colour

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