The addition of oxides, sulfides, salts, and other compounds of different metals to molten glass at the time of manufacture adds colour to glass. Cobalt oxide: deep blue colour; Copper oxide: turquoise; Chromium: dark green to black; Cadmium sulfide: deep yellow, etc.

Cabalt oxide The addition of oxides, sulfides, salts, and other compounds of different metals to molten glass at the time of manufacture adds colour to glass. Cobalt oxide: deep blue colour; Copper oxide: turquoise; Chromium: dark green to black; Cadmium sulfide: deep yellow, etc.

Which of the following imparts a blue colour to glass?

Q. Which of the following imparts a blue colour to glass?
Answer: Cabalt oxide
Notes: The addition of oxides, sulfides, salts, and other compounds of different metals to molten glass at the time of manufacture adds colour to glass.

Cobalt oxide: deep blue colour;
Copper oxide: turquoise;
Chromium: dark green to black;
Cadmium sulfide: deep yellow, etc.

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