The weight in grams of K2Cr2O, required to oxidise
Fe2+ ions present in 7.6 gram of FeSO4 to Fe3+ if the
reaction is carried out in an acidic medium is
(a) 15.2 grams
(b) 2.45 grams
(c) 7.6 grams
(d) 4.9 grams
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