Question

A mixture of oxygen and ethyne is burnt for welding .can you tell why a mixture of ethyne and air is not used ?

Answer 1

hey !!!

Ethyne is an unsaturated hydrocarbon containing high percentage of carbon in it .

1. when a mixture of ethyne and pure oxygen is burnt ,then ethyne burns completely producing am extremely hot blue flame which can be used welding metals .

2. if , however , a mixture of ethyne and air is burn , then incomplete combustion of ethyne takes place ( because of insufficient oxygen of air ) producing a yellow , sooty flame which is not hot enough to weld metals .

hope it helps !!!

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Answer 2

Answer:

• A mixture of oxygen and ethyne is burnt for welding instead of mixture of ethyne and air because the production of heat is very important for welding metals.
• When oxygen and ethyne are burnt, it burns completely and produces a higher temperature than air and ethyne.
• Oxygen and ethyne produce very hot blue flame but the mixture of air and ethyne gives out a sooty flame which means that there are unburnt particles resulting in lesser heat.