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In high concentrations or long distances (such as our atmosphere) may be slightly perceived as bluish. Ozone is has a very strong odor, detectable by humans in concentrations as low as 0.001 ppm. However humans also can acclimate to the smell of ozone quickly, even levels that are considered dangerous for long term exposure for workplace safety, and we can not notice the smell unless we can get away from it for a while.

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14y ago
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14y ago

No. It has a very pungent smell. If ever after a thunderstorm you smell something like that, it is ozone. You smell this because ozone is created when lightning interacts with oxygen.

After a short period of time, your nose will become acclimated to the presence of ozone, and you will not notice it, unless the concentration increases.

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12y ago

Oxygen gas has NO color, like most gases. It is also odorless.

It's the same as asking: 'What do you see and smell' when you're in (clean, fresh) air, containg 20% oxygen!

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14y ago

Gaseous, yes. Liquid oxygen is light blue.

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11y ago

Yes. xenon is colourless and odourless gas.

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11y ago

it has a dioxide content of negative zero

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14y ago

yep

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Q: Why is oxygen colorless odorless and tasteless?
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