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A mixture of oxygen & ethyne is burnt for welding. Why do you think a mixture of ethyne & air is not used?
Answers (1)
In the air, a lot of elements or molecules can be present. This will create a problem for the complete burning of ethane. Incomplete combustion will take place giving a sooty flame and less heat is produced. When pure oxygen is used ethyne burns completely producing large amounts of heat and blue flame. This heat is sufficient for metal to melt and welding is done.
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