Question

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

Answer 1

When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of air. However, if ethyne is burnt withoxygen, it gives a clean flame with temperature 3000°C because of complete combustion. ... This is the reason why a mixture of ethyne and air is not used.

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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.