A) On heating it melts and loses its water of crystallization.
B) It's aqueous solution is basic in nature.
C) It is used in dyeing industries.
D) It's empirical formula is \[KAl{{\left( S{{O}_{4}} \right)}_{2}}.12{{H}_{2}}O.\]
Correct Answer: B
Solution :
[b] Alum form acidic solution due to hydrolysis of\[A{{l}^{3+}}\].
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