1sory answer is c
mani tussi gr8 ho
aab samjha tera tukka
an aq solution of FeSO4 ,Al2(SO4)3 and chrome alum is heated wid excess Na2O2 and filtered .d materials obtained are
a)a colurless filtrate n green residue
b)yellow filtrate n green residue
c)yellow filtrate n brown residue
d)green filtrate n brown residue
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10 Answers
11I think ans shud be C
bec.
FeSO4 is oxidsed bu Na2O2 to Fe(OH)3 [BROWN]
Cr3+ with Na2O2 gives Chromate [YELLOW]
11the answer id C as i told earlier
this is an IIT 1996 question
the filtrate is yellow due to the presence of CrO4-and the reidue is brown due to Fe(OH)3
11sorry.......haan sahi hai...ans is C....(chromate toh yellow hi hota hai.)