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CGP EDU Academic Team
Published on: August 14, 2026
Ferrous ion changes to X ion on reacting with acidified hydrogen peroxide. The number of d-electrons present in X and its magnetic moment (in BM) are respectively
Text Solution
Verified by ExpertsThe correct answer is:
B
5 and 5.92
Ferrous ion (Fe 2+ ) changes to ferric ion Fe 3+ on reacting with acidified H 2 O 2 as.
2Fe 2+ + H 2 O 2 + 2H + 
2Fe 3+ + 2H 2 O
Electronic configuration of Fe 3+ = 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5
Number of d-electrons = 5
Magnetic moment = 
= 5. 92 BM
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