Consider the following test for a group-IV cation. M2+ + H2S A (Black precipitate) + byproduct A + aqua regia B + NOCl + S + H2O B + KNO2 + CH3COOH C + byproduct The spin only magnetic moment value of

Question

Consider the following test for a group-IV cation. M2+ + 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)

Prashant Kotian · Accepted Answer

Correct answer: .. Co2+ + H2S  CoS  (Black) (A) CoS + Aqua-regia Co2+ (aq) + NOCl + S +H2O (A) (B) Co2+ (aq) + KNO2 + CH3COOH  K3[Co(NO2)6] + NO + S + H2O In K3[Co(NO2)6]  Co+3d6 4s0 Co3+ : d2sp3 Hybridisation Number of unpaired e–= 0 Magnetic moment = n(n 2)  = 0 B.M

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