What do you mean by the term alum
What do you mean by the term alum? Also illustrate its uses?
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Alum is the chemical (that is, aluminum potassium sulphate); it tends to be whitish powder with many uses, comprising:
a) As an astringent.b) As an anti-bacterialc) As a food preservative.d) As the Styptic pencil to heal the shaving cuts.e) To stem the flow of minor blood cuts and loss.f) Soaked to the materials to make them flame retardant.
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Vapour pressure of CCl425Degree C at is 143mm of Hg0.5gm of a non-volatile solute (mol. wt. = 65) is dissolved in 100ml CCl4 .Find the vapour pressure of the solution (Density of CCl4 = = 1.58g /cm2): (a)141.43mm (b)
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