Questions
Which statement is not rue about potash alum?
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By Expert Faculty of Sri Chaitanya
a
Its empirical formula is KAl(SO4)2.12H2O
b
Its aqueous solution is basic in nature,
c
It is used in dyeing industries
d
On heating it melts and loses its water of crystallization
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Correct option is B
Alum undergo cationic hydrolysis.Cation of weak base and anion of weak acid only undergoing hydrolysis.Due to the liberation of H+ ion the aqueous solution shows acidic nature and not basic nature.III) It is used in dyeing industry, It is used in the purification of water, It is used in tanning of leather.On heating it loses water of crystallisation.Similar Questions
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