54
Question
Identify the object that would become shiny on rubbing with a sandpaper.
Identify the object that would become shiny on rubbing with a sandpaper.
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Solution
The correct option is A Copper
Materials can be classified as lustrous and non-lustrous based on their appearance. Lustrous materials have a shiny surface while non-lustrous materials have a dull surface.Metals like Copper that are shiny in nature often lose their lustre when left exposed to air and moisture for a long time. For such metals, lustre can be regained by rubbing the surface of the metal with sandpaper. This scraps off the top dull layer and exposes the lustrous surface of the metal underneath. Wood, plastic and glass are non lustrous.
Materials can be classified as lustrous and non-lustrous based on their appearance. Lustrous materials have a shiny surface while non-lustrous materials have a dull surface.Metals like Copper that are shiny in nature often lose their lustre when left exposed to air and moisture for a long time. For such metals, lustre can be regained by rubbing the surface of the metal with sandpaper. This scraps off the top dull layer and exposes the lustrous surface of the metal underneath. Wood, plastic and glass are non lustrous.
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