Question

Why is a mixture of acetylene and oxygen instead of acetylene and air, used for welding purposes.​

Answer 1

Answer:

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Explanation:

Acetylene being an unsaturated hydrocarbon, burns incompletely in air due to which a sooty flame is produced with very low temperature. On the other hand when a mixture of acetylene and pure oxygen is burnt, then it gives rise to the complete combustion of acetylene to produce a blue flame with a very high temperature which can be used to weld the metals.

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Answer 2

Acetylene being an unsaturated hydrocarbon, burns incompletely in air due to which a sooty flame is produced with very low temperature. On the other hand when a mixture of acetylene and pure oxygen is burnt, then it gives rise to the complete combustion of acetylene to produce a blue flame with a very high temperature which can be used to weld the metals