Question

why hydrogen flame is used for welding and cutting metals​

Answer 1

Answer:

An hydrogen flame is used for cutting and welding of two metallic pieces together due to the heat produced by the flame , i.e , 2800 ° C . At this temperature the metal gets melted easily and hence it can easily be cut apart or welded together.

Answer 2

Answer:

Due to the heat produced by the flame.

Explanation:

2800° C

At this temperature metal gets melted easily and therefore used for cutting and welding metals.