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Combustion And Flame

Question

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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 the candle flame. Ramesh kept the beaker in the outermost of the flame. Whose water will get heated in a shorter time?

Solution

The water heated by Ramesh will get heated in a shorter time because he kept his beaker near the hottest zone of the flame. On other hand Abida kept the beaker in the yellow part of the candle flame, which is less hotter than blue part.

Some More Questions From Combustion And Flame Chapter

Burning of wood and coal causes __________ of air.

A liquid fuel, used in homes is __________

Fuel must be heated to its __________ before it starts burning.

Fire produced by oil cannot be controlled by ___________ .

Explain how the use of CNG in automobiles has reduced pollution in our cities.

Compare LPG and wood as fuels.

Give reasons :

Water is not used to control the fire involving electrical equipment.

Give reasons :

LPG is a better domestic fuel than wood.

Give reasons :

Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

Make a labelled diagram of candle flame.

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