Chemistry
Peptization is a process of

Purification of colloids
Precipitation of colloidal particles
Dispersing precipitates into colloidal solution
Protection of colloidal solution

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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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