Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass?
Correct answer: C. Copper
- A. Chromium
- B. Arsenic
- C. Copper
- D. Manganese
Explanation
Copper oxide imparts blue to greenish-blue shades to glass, depending on its concentration and oxidation state. Chromium generally produces green glass, while manganese is commonly used for violet or decolorizing effects.
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