Different oxides have different colors.
Iron III oxide is reddish orange, aluminum oxide is colorless.
Those are just a couple examples
Different oxides are different colour: for example, water is clear, rust is brown.
brickish color
dull
No. Copper oxide is just copper and oxygen. It is generally green in color and is often seen as weathering or corrosion on copper. Hydrogen is an element and is not part of copper oxide.
Zinc White
the red color is presence of ion oxide
brickish color
Aluminum oxide is a white solid.
White
the colour of mercuric oxide is an orange powder.
the color varies but it can be in white and light shades of color
White
dull
Black
it is variable
Rust colored.
white solid
Yes