These chemical compounds all contain copper as the central element and are commonly used in various industries and applications. Here is a brief description of each compound:

CuSO4 (Copper(II) sulfate): This compound is a blue crystalline solid that is commonly used as a fungicide in agriculture, as a coloring agent in ceramics, and as an electrolyte in batteries.

Cu(OH)2 (Copper(II) hydroxide): This compound is a blue solid that is commonly used as a fungicide and an algaecide in agriculture and aquaculture.

CuO (Copper(II) oxide): This compound is a black solid that is used as a pigment in ceramics, as a catalyst in chemical reactions, and in the manufacturing of batteries.

CuCl2 (Copper(II) chloride): This compound is a greenish-blue solid that is used as a catalyst in organic reactions, as a mordant in dyeing textiles, and as a fungicide and wood preservative.

Cu(NO3)2 (Copper(II) nitrate): This compound is a blue crystalline solid that is used as a catalyst in organic reactions, in the manufacturing of fireworks, and as a coloring agent in ceramics.