Question

an element x on exposed to moist returns ready from under new compound by his forms the substance x and y are
A) x=fe y=fe2o3
B) x=ag y=ag2s
C) x=cu y=cuo
D) x=al y=al2o3

Answer 1

X is Cu and Y is CuO.

Answer 2

Option (c) x = Cu , y = CuO