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Question

Green coloured glasses are obtained by adding :
  1. Cobalt oxide
  2. Aluminium oxide
  3. Ferrous iron
  4. Cupric salt

A
Aluminium oxide
B
Ferrous iron
C
Cobalt oxide
D
Cupric salt
Solution
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Green colored glasses are obtained by adding ferrous ion that is ferrous oxide(FeO). these glasses are frequently used in beer bottles. Together with chromium it gives a richer green color, used for wine bottles.

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