Anu wants to boil water quickly in a test tube. On observing the different zones of the flame, she is not able to decide which zone of the flame will be best for boiling water quickly. Help her in this activity.

AcademicChemistryNCERTClass 8

Anu should keep her test tube in the outermost zone or non-luminous zone of the flame because it is the hottest zone of a flame.

[Note: In the outer zone of a flame, complete combustion of the fuel takes place because there is plenty of air around it so things get heated up faster in this zone.]
Updated on 10-Oct-2022 13:26:57