Question

a mixture of Oxygen and ethyne used for welding can you tell why a mixture of ethyne and air is not used

Answer 1

When ethyne is burnt in air incomplete burning takes place and produce sooty flame due to limited supply oxygen present in the air.
Thats why oxy ethyne is used.
hope this helps you.
Have a great day ahead

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.