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The correct option is B False
Alum powder is a colorless and odorless crystalline powder.
The most important alums are potassium alum, sodium alum, and ammonium alum.
It is used for purifying water by making the suspended impurities present in the water heavier and causing them to settle.
Solubility of alum powder
The solubility of alum powder in water is directly proportional to the temperature of the water which means that as the temperature of the water increases the solubility of alum powder in water also increases.
Also, alum forms a true solution when it is dissolved in water which is pale yellow in color.