Question

9. Which zone of a flame does a goldsmith use for melting gold and silver and why?​

Answer 1

Outermost zone

Step-by-step explanation:

Because the outermost zone is the hottest part of the flame.

Answer 2

outer most zone

Step-by-step explanation:

The outermost zone is used by a goldsmith for melting gold and silver. This is because it is the hottest zone of the flame where complete combustion takes place.