Question

which zone of flame does a goldsmithuse for melting gold and silver and why​

Answer 1

Goldsmiths use the outermost part/zone of the flame to melt gold and silver. This is because the outermost zone of the flame undergoes complete combustion and is the hottest part of the flame.

Answer 2

Goldsmith uses the outermost zone of a flame for melting gold and silver.