CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER 101 Mark
MCQ
The copper articles turn green when kept for long due to
A
Corrosion
B
Rusting
C
Precipitation
D
Rancidity
✓
Answer
(a) Corrosion Explanation: The copper articles turn green when kept for long due to corrosion in which metal is eaten up gradually by the action of air, moisture or a chemical (such as an acid) on their surface.
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