Question

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

Answer 1

When ethyne is burnt in air incompleteburning takes place and produce sooty flame due to limited supply oxygenpresent in the air. ... Hence, This oxy-acetylene flame is used for weldingand it is not possible to attain such a high temperature with air. Due this reason a mixture of ethyne and air is not used for welding.

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.