Question

Can pure oxygen kills us ? Explain . Don't use Google .Answer if you know​

Answer 1

HERE IS YOUR ANSWER :-

As we inhale normal air that contains approx 21%oxygen and in this presence the haemoglobins take this oxygen molecules to different parts in our body and some of this oxygen molecules get converted into free radicals or oxidant. And this oxidant ( that is one electron less in outer shell) so for getting this electron this molecules try to break their nearest bonds and try to take the electron.

so for nutralizing this process our body produces some antioxidant which help to nutralize this process.

Now see we will take 100% pure oxygen then its not possible to control this process by the antioxidant. This leading to death.

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Answer 2

Our blood has evolved to capture the oxygen we breathe in and bind it safely to the transport molecule called haemoglobin. If you breathe air with a much higher than normal O2 concentration, the oxygen in the lungs overwhelms the blood's ability to carry it away.

The result is that free oxygen binds to the surface proteins of the lungs, interferes with the operation of the central nervous system and also attacks the retina.

Contrary to popular myth, hyperventilating air at ordinary pressures never causes oxygen toxicity (the dizziness is due to CO2 levels dropping too low), but breathing oxygen at pressures of 0.5 bar or more (roughly two and a half times normal) for more than 16 hours can lead to irreversible lung damage and, eventually, death.

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