Multiple choice

Which of the following forms part of the verdigris patina?

  1. Columbite

  2. Copper(II) carbonate

  3. Copper(II) chloride

  4. Copper(II) hydroxide

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Copper(II) carbonate is a blue-green compound (chemical formula CuCO3) forming part of the verdigris patina that is found on weathered brass, bronze and copper.