Question

what color does cobalt - oxide produce?
a. blue - violet
b. red
c. yellow
d. green
please select the best answer from the choices provided
a
b
c
d

Explanation:

Cobalt - oxide is known to produce a blue - violet color. This is a characteristic property of cobalt - oxide in various applications such as in ceramics, glass, and pigments.

Answer:

A. blue - violet