give reasons
copper turns black when heated in air
Please refer to the following link:
https://www.meritnation.com/ask-answer/question/brown-coloured-copper-powder-turns-black-on-heating-in-air-w/science/7786547
https://www.meritnation.com/ask-answer/question/brown-coloured-copper-powder-turns-black-on-heating-in-air-w/science/7786547