Questions
Which of the following is pseudo alum?
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By Expert Faculty of Sri Chaitanya
a
NH42SO4⋅Fe2SO43⋅24H2O
b
K2SO4⋅Al2SO43⋅24H2O
c
MnSO4⋅Al2SO43⋅24H2O
d
None of these
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Correct option is C
A pseudo alum is a double sulfate of the typical formula ASO4B2(SO4)324H2O,where A is a divalent metal ion, such as cobalt , manganese , magnesium or iron , and B is a trivalent metal ion. i.e. class of alums in which the usual mono valent metal of a true alum is replaced by a bivalent metal.so MnSO4⋅Al2(SO4)3⋅24H2O is pseudo alum
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