Question

which zone of flame is used by goldsmith use for melting gold and silver and why?​

Answer 1

Answer:

The goldsmith uses the outermost zone of the flame to use for melting gold and silver because it is the hottest part of the flame and undergoes complete combustion.

Answer 2

Answer:

the upper part of the flame

Explanation:

because it is the hottest part of 3 parts of flame.

The upper part is hottest ,the middle part is less hot and the lower part is less hotter compared to the other parts.