Question

Why goldsmiths blow the outermost zone of a flame to melt gold and silver?
a) because it is the least hot

b) because it has unburnt wax vapours

c) because it supports partial combustion

d) because it supports complete combustion​

Answer 1

Answer:

because it supports complete combustion

Explanation:

Goldsmiths blow the outer most zone of a flame in order to melt gold or silver because the outermost zone is a zone of complete combustion, also known as luminous zone. The ignition temperature of this zone is the highest and thus helps in melting the metal the best in order to creat desired designs or patterns.