Question

why are ethyne and air not used for welding?

Answer 1

Explanation:

because in air very less amount of oxygen is present so it leads to incomplete combustion leading to a sooty flame

Answer 2

Answer:

HELLO DEAR !!!

GST ♥

ETHYNE WHEN MIXED WITH AIR...IT UNDERGOES INCOMPLETE COMBUSTION TO GIVE YELLOW FLAME WID LOTS OF BLACK SMOKE....

THIS RESULTS ON SOOTY DEPOSITS ON THE METAL PLATES TO BE WELDED

SO ONLY ETHYNE & OXYGEN IS USED FOR WELDING

HOPE IT HELPS :)