Qualitative Analysis - Result Question 18

####18. An aqueous solution FeSO4Al2(SO4)3 and chrome alum is heated with excess of Na2O2 and filtered. The materials obtained are

(1996, 1M)

(a) a colourless filtrate and a green residue

(b) a yellow filtrate and a green residue

(c) a yellow filtrate and a brown residue

(d) a green filtrate and brown residue

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Solution:

  1. Yellow filtrate contains CrO5 and brown residue contain Fe2O3.


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