Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Lowest possibleoxidation states of Mn, Cr, Cl and Os are +2, +3, –1 and zero respectively. Which of the given species require least number of moles to oxidise 25 ml of 0.5 (M) Fe 2+ solution ?
A
OsO 4
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, c)
hence for 1 mole OsO 4 , 8 moles Fe 2+ required
Mn 2+ , hence for 1 mole 
, 5 moles of Fe 2+ required
Cl – , hence for 1 mole of 
, 8 moles of Fe 2+ required
Cr 3+ , hence for 1 mole of 
, 6 moles of Fe 2+ required.
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