Question

when copper powder is heated in a china dish,the surface of copper powder become coated with black colour how has it black colour substance formed

Answer 1

When Copper is burned in the presence of oxygen a black colored substance is formedover the copper surface. 1 ) This black colored substance is formed as a result ofCopper reacting with atmospheric Oxygen while being heated up. This results in theformation of black colored coating.

Answer 2

HI

⭐️The surface of copper powder becomes black on heating since :

⚪️ Oxygen is added to copper and,

⚪️ Copper oxide (ll) is formed which is black in colour.

Hope it proved to be beneficial....