If a glass is blue in colour, which additional compound does it contain?

Ferrous compound

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Chromium compound

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Cobalt compound

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Nickel compound

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Solution

The correct option is C Cobalt compound
The soda-lime glass is colourless. Compounds of certain metals are added to it to add colour. These mixtures are added to a molten mixture of glass. Cobalt compounds add blue colour to glass.

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