Question

Abida and Ramesh were doing an experiment in which water was to be heated in a beaker . Abida kept the beaker near the wick in the yellow part of candle flame . Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time.

Answer 1

Zones of a flame

• There are three zones in the candle flame in which the non–luminous zone is the zone of complete combustion.
• The first zone is called the outer zone,and the second zone is called the middle zone.
• The third zone is called as Inner zone.
• The luminous zone has a limited oxygen supply and is moderately hot and the third zone is the dark zone.
• This does not burn due to the absence of air.

Whose water will get faster heating :

• The water in Ramesh’s beaker will heat up in a shorter time.
• Since he has kept the beaker in the outermost zone of a flame which is the hottest zone in which the complete combustion is taking place
• Whereas Abida's beaker which is kept in the yellow zone is less hot .
• As the middle zone which is the zone of partial combustion so it is less hot than the outermost zone.

Hence, Ramesh’s water will get heated in a shorter time.