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This Chemistry Colour Quiz Is Seriously Difficult

It's [neon](https://en.wikipedia.org/wiki/Gas-discharge_lamp#/media/File:Neon_discharge_tube.jpg).

The green was [emerald](https://www.flickr.com/photos/nostri-imago/2925279365), the yellow was [cerium sulphate](https://en.wikipedia.org/wiki/Cerium(IV)_sulfate), and the red was [realgar](https://en.wikipedia.org/wiki/Realgar).

It's the [blue](https://en.wikipedia.org/wiki/Copper(II)_sulfate)!

It's [chlorine](https://commons.wikimedia.org/wiki/File:Chlorine_ampoule.jpg), and it's really bad for you – it was used as a weapon in World War One.

Ah well, chemistry class was a long time ago.

Hey, not too shabby.

Not bad. Still remember the odd thing from the chemistry lab, then.

Remarkable. You're really good at this,

Full marks! Amazing. You must have paid attention in chemistry class.

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This Chemistry Colour Quiz Is Seriously Difficult

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