Chemistry
Phosphorus is kept in water because

Its ignition temperature is very low
Its ignition temperature is very high
Its critical temperature is low
Its critical temperature is high

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Chemistry
The open "Sigrees" or coal stoves often require fanning to sustain burning because of

Lack of oxygen in the surroundings of sigrees
Accumulation of smoke and dust over the sigrees
Interrupted release of moisture from the material
Tendency of carbon dioxide to form a layer along with dust smoke

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