Question

A mixture of oxygen and ethyne is burnt for welding. Why do you think a mixture of ethyne and air is not used ?

Answer 1

it is because air contains many gases like o2,co2,no2 etc but for welding ethyne should burn completely as air contains many gases it is hard to burn ethyne therefore air is not used

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.