Question

A black layer is formed when copper powder is heated in a crucible. Name the compound responsible for the black layer.​

Answer 1

Answer:

The black coloured substance iscopper oxide. It has formed due to reaction of copper with oxygen. 1) Ablack colored substance of copper (II) oxide is formed when the “copper powder” is heated in a 'china dish'

Explanation:

Answer 2

Lets solve for it,

Explanation:

Copper is a reddish brown metal, when heated in a crucible(an open pot used to heat metals) a black coloured layer appears on the metal. This is because copper reacts with the oxygen present in the air and gets converted into copper oxide which is of black colour. the equation is as follows:

   Cu        +    O₂ ---->   2CuO

(copper)     (oxygen)      (copper oxide, black colour)