p-Block elementsHard
Question
Which mixed sulphate is not an alum:
Options
A.K2SO4.Al2(SO4)3.24H2O
B.K2SO4.Cr2(SO4)3.24H2O
C.Na2SO4.Fe2(SO4)3.24H2O
D.CuSO4.Al2(SO4)3.24H2O
Solution
M is divalent, it should be monovalent according to the formula of alum.
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