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PART - 1 CH - 3 Metals and Non-Metals — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10SciencePART - 1 CH - 3 Metals and Non-Metals3 Marks
Question
Give examples of corrosion.
✓

Answer

Examples of corrosion are as follows:
→ 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.
→ 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.
→ Iron when exposed to moist air for a long time acquires a coating of brown flaky substance called rust.

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