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For a redox reaction, FeS 2 + KMnO 4 → Fe 2 O 3 + S 8 + Mn +2 if 1 mole of S 8 is produced then calculate moles of KMnO 4 consumed : (1) 1 mole (2) 8/5 mole (3) 16/5 mole (4) 12/5 mole

 
For a redox reaction, FeS2 + KMnO4 → Fe2O3 + S8 + Mn+2 if 1 mole of S8 is produced then calculate moles of KMnO4 consumed :
(1) 1 mole
(2) 8/5 mole
(3) 16/5 mole
(4) 12/5 mole

Grade:12

1 Answers

Sakshi
askIITians Faculty 652 Points
8 years ago
Hi Students..
To work out this question, one needs to take into account the role of n factor for the reaction.
For this reaction, the equivalents of S8 so produced will be equal to the equivalents of KMnO4.
Applying the equation. nXnf (for KMnO4) = nXnf (S8)

5Xx = 1X8
x= 8/5

Answer is (b)

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