Question

Why do goldsmith blow the outermost zone of the flame?

Answer 1

Goldsmiths blow the outermost zone of a flame in order to melt gold or silver because it is the hottest zone of a flame.it is also known as Non- luminous zone.it burns with complete combustion.it means that it burns with the supply of air. The hottest zone is used for the melting purpose of metals. It is blue in colour. It produces carbon dioxide.