Question

Draw the electron dot structure of ethyne. A mixture of ethyne and oxygen is burnt for welding. In your opinion, why cannot we use a mixture of ethyne and air for this purpose.

Answer 1

Electron dot structure of ethyne

No, the mixture of ethyne and air cannot be used for welding because when ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by the Limited supply of air. However, if ethyne is burnt with oxygen, it gives a clean flame with temperature 3000^oC because of complete combustion. This oxy-acetylene flame is used for welding. It is not possible to attain such a high temperature without mixing oxygen