MCQ
Which one is a pseudo alum
- A$(NH_4)_2SO_4.Fe_2(SO_4)_3.24H_2O$
- B$K_2SO_4.Cr_2(SO_4)_3.24H_2O$
- ✓$MnSO_4.Al_2(SO_4)_3.24H_2O$
- DNone of these
✓
Answer
Correct option: C.
$MnSO_4.Al_2(SO_4)_3.24H_2O$
c
Alum $\mathrm{M}_{2} \mathrm{SO}_{4}\,\, \,\mathrm{M}_{2}^{\prime}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}$
Alum $\mathrm{M}_{2} \mathrm{SO}_{4}\,\, \,\mathrm{M}_{2}^{\prime}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}$
here $M=M^{+}$ monovalent
$M^{\prime}=M^{+2} \text { divalent }$
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