Answers

2016-01-30T21:40:13+05:30
Because ethyne is an unsaturated carbon compounds , so contain a comparatively higher percentage of carbon and hence need higher amount of oxygen for complete combustion , so when burned with oxygen complete combust ion of ethyne takes place producing a high temperature required for welding
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2016-02-01T14:33:32+05:30
As ethene being a unsaturated compound needs more oxygen to burn to its fullest
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