A chemical change in which a change of colour takes place from blue to black.Plz write the chemical reaction.

A chemical change in which a change of colour takes place from blue to

1.	A chemical change in which a change of colour takes place from blue to black.Plz write the chemical reaction.
Answer» HEY MATE HERE IS YOUR ANSWER PLZ MARK ME AS BRAINLIST THIS IS A REVERSIBLE REDOX REACTION