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Question
19. Give the reason why some metals become dull and lose their shine.
19. Give the reason why some metals become dull and lose their shine.
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Solution
- Metals are lustrous due to which metal has a shiny appearance.
- Some metals react with oxygen in presence of moisture and form a dull layer at the surface of the metal.
- Hence, due to the formation of dull layer metals loses their shine and become dull.
- Metals are lustrous due to which metal has a shiny appearance.
- Some metals react with oxygen in presence of moisture and form a dull layer at the surface of the metal.
- Hence, due to the formation of dull layer metals loses their shine and become dull.
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