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When you heat a China dish containing 1 gm of Copper powder, a Black substance is formed on the surface of the powder due to:

 When you heat a China dish containing 1 gm of Copper powder, a Black substance is formed on the surface of the powder due to:

1
Atomization
2
Carbonization
3
Oxidation
Correct Answer
4
Desalinization

The correct answer is Oxidation.

  • In this situation, copper reacts with oxygen in presence of air and formed copper oxide.
  • Reaction equation: 2Cu(s) + O(g) = 2CuO (s).

Important Points 

Atomization
  • It is a spray method.
  • The process of breaking up bulk liquids into droplets.
Carbonization
  • A process in which fuel is heated (900–1,200 °C) without air to leave solid porous carbon.
  • By this process, cole creates coke and sub byproducts.
Desalinization
  • It is a process that takes away mineral components and salts from saline water.
  • Changing seawater into potable water by a chemical process.
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