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The pair having the same magnetic moment is : [At. No, : Cr = 24, Mn = 25, Fe = 26, Co = 27]

1. [Cr(H 2 O) 6 ] 2+ and [CoCl 4 ] 2–
2. [Cr(H 2 O) 6 ] 2+ and [Fe(H 2 O) 6 ] 2+
3. [Mn(H 2 O) 6 ] 2+ and [Cr(H 2 O) 6 ] 2+
4. [CoCl 4 ] 2– and [Fe(H 2 O) 6 ] 2+ Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Co-ordination compounds, Solved Example No.-17 ] [ JEE Advance, Chapter : Co-ordination compounds, Solved Example No.-22 ]

Correct answer: [Cr(H 2 O) 6 ] 2+ and [Fe(H 2 O) 6 ] 2+

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