Question

A table spoon full of copper powder was heated strongly in a China dish which resulted into a black substance. A pinkish brown coating was found over the black substance when hydrogen gas was passed over it. 1)What is the name of the black substance.2) Name the pinkish brown substance.3) Name the type of chemical reaction in the first and second situation.4) name the type of reaction if both happened simultaneously

Answer 1

black substance is Cuo
the pinkish brown substance is cu
redox reaction

Answer 2

1. CuO
2. it's copper only plus water
3 . 2Cu. +02 = 2 CuO
2Cuo+ 2H2 ----- 2Cu + 2H2O
4. redox