Choose a correctly matched pair from the following.

Purple glass- Manganese dioxide

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Green glass- Chromium ions

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Yellow glass- Ferrous ion

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Blue Glass- Cobalt chloride

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Solution

The correct option is B Green glass- Chromium ions
Different ions or compounds are added during manufacture of glass to get a colour. The compound or ions and the colours they impart to glass are as follows:

Ferric ion- Yellow colour
Chromium/Ferrous ion- Green colour
Cobalt oxide- Blue colour
Manganese Oxide- Purple colour

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