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Chemistry CBSE Live product
Class 10 (2026-27)
Metals and non-metals
Extraction, Corrosion, and Alloys
9.
Corrosion and alloys
Question:
2
m.
Choose the correct answer:
1
.
Silver articles become black on prolonged exposure to air. This is due to the formation of
\(Ag_2O\)
\(Ag_2S\) and \(Ag_3N\)
\(Ag_3N\)
\(Ag_2S\)
2.
Why is pure copper preferred in electrical wiring over bronze?
Copper is cheaper
Copper has higher electrical conductivity
Bronze is toxic
Bronze is heavier
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