Question

anu wants to boil water quickly test tube. on obeserving the different zones of flame,she is not able to decidee which zone of flame will be best for boilingwater quickly. help her in this activity

Answer 1

non luminous zone is the hottest zone

Answer 2

Anu must boil water from the outermost part of the flame and as it is the non-luminous zone its temperature is highest.Its temperature is highest just because at that place the complete combustion of the wax vapours is occurring that's why its is the hottest part of the flame.