Science, asked by kaira199singh, 7 months ago

some objects made of metal become dull after some time.give reason.

Answers

Answered by tis00160

Answer:

It is the effect of air and moisture. Metals like iron, alluminium etc. ... Parts of air like hydrogen sulphide, sulphur, carbonates reacts with metals like silver (reacts with hydrogen sulphide to form silver sulphide) and copper (reacts with sulphur to form copper sulphate) which causes dullness

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Answered by Anonymous

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