3.5 CORROSION
Chapter 3: Metals and Non-metals · SCIENCE · EN medium
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You hav e learnt the following about corrosion in Chapter – n Silver articles become black after some time when exposed to air. This is because it reacts with sulphur in the air to form a coating of silver sulphide. n Copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. This green substance is basic copper carbonate. n Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust. Let us find ou t the conditions under which iron rusts.
📖 ncert books class 10 science chapter 3 · Page 17
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You hav e learnt the following about corrosion in Chapter – n Silver articles become black after some time when exposed to air. This is because it reacts with sulphur in the air to form a coating of silver sulphide. n Copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. This green substance is basic copper carbonate.
n Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust. Let us find ou t the conditions under which iron rusts.
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