General Knowledge - General Science - Discussion

15. 

Deep blue colour is imparted to glass by the presence of

[A]. cupric oxide
[B]. nickel oxide
[C]. cobalt oxide
[D]. iron oxide

Answer: Option C

Explanation:

No answer description available for this question.

Sanjeev said: (Aug 27, 2013)  
Glass colour : Cobalt-blue / iron (2) oxide-Green(together with chromium yields a darker green colour usually used in wine or beer bottles CARLSBERG !!) / metallic gold " rich ruby coloured glass / copper " very dark red opoque glass / Nickel " purple glass /tin oxide " opaque white.

Sonu said: (Aug 31, 2016)  
Cobalt(II,III) oxide - Co3O4.

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