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Consider the following test for a group-IV cation. M^2+ + H2S → A (Black precipitate) + byproduct A + aqua regia → B + NOCl + S + H2O B + KNO2 + CH3COOH → C + byproduct The spin only magnetic moment value of the metal complex C is _____ BM. (Nearest integer)

1. 0
2. 1
3. 2
4. 3

Correct answer: 0

Solution

The correct option is 0 because the metal complex C is likely to be a low-spin d6 complex, which has all its electrons paired, resulting in no unpaired electrons and thus a spin-only magnetic moment of zero.

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