Q73 of 87 Page 107

The outermost zone of a candle flame is the:

In the outer zone complete combustion of the fuel takes place and the colour of the flame is blue and is the hottest part of the flame.

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A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because:

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If the clothes of a person working in the kitchen catch fire, then to extinguish the fire:

 74

The flame of a kerosene oil lamp (or lantern) has:

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A lot of dry powder of one of the following chemicals can be released over a fire to extinguished it. This chemical is: