Question

2800 (
RS
ण 200 ncy
19. चाँदी के उपर काली परत चढ़ना किसका उदाहरण है?​

Answer 1

Answer:

Corrosion

Explanation:it is the slowly eating up of metal on its surface by the action of atmospheric gases like water vapour ,CO2,H2O etc ..when silver items are exposed to the town atmosphere for a long period of time a layer of sulphide get deposited on it called Ag2S