Question

Which of the following coloring agent is used to impart Blue color in Glaze?

• A. \(NiO\)
• B. \(CoO\)
• C. \(MnO\)
• D. \(ZnO\)

Hint:

Cobalt oxide \((CoO)\) is a common ceramic colorant used to produce blue color in glazes.

Answer 1

The Correct Option is B

Concept: Metal oxides are commonly used as coloring agents in ceramic glazes. Different oxides produce different colors.

Step 1: Cobalt oxide is one of the strongest ceramic colorants.

Step 2: Cobalt oxide produces blue color in ceramic glaze. \[ CoO \rightarrow \text{Blue color} \]

Step 3: Nickel oxide generally gives grey, brown, or greenish shades depending on glaze composition.

Step 4: Manganese oxide generally gives brown, purple, or black shades.

Step 5: Zinc oxide is not mainly used to produce blue color. Therefore, the coloring agent used to impart blue color in glaze is: \[ \boxed{CoO} \]