The bottles contain: oxygen, hydrogen, air and carbon monoxide (4) How can you tell which gas is in each bottle? Make your plan for identifying gaseous substances
You can distinguish between these four gases with the help of a smoldering torch.
In a test tube with carbon dioxide, the torch will go out.
No changes will be observed in a test tube with air.
In a test tube with oxygen, a torch will ignite.
A gas pop will occur in a test tube with hydrogen as a result of the reaction:
2H2 + O2 = 2H2O
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