Increasing value of magnetic moments of I: Ni(CO)_4, II: [Ti(H_2O)_6]^ 2+ , III: [V(H_2O)_6]^ 3+ , IV: [V(H_2O)_6]^ 2+ is

JEE Advanced Chemistry question

Increasing value of magnetic moments of I: , II: , III: , IV: is

(A)I < II < III < IVCorrect
(B)IV < III < II < I
(C)II < III < I < IV
(D)II < I < III < IV

Answer: (A)

Solution

In , nickel is in the zero oxidation state (), so there are no unpaired electrons and (I is lowest). in is (2 unpaired, BM) and in is also (2 unpaired, BM) — these two have essentially

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Question ID VK-159687