Match the coordination compounds in Column I having the given type of hybridisation of M ^ n + ion and magnetic moment as given in Column II. ( array |l|l|l|l| & Coordination compounds. & & Hybridisation & Magnetic nature. A & Ni ( CO )₄ & P & sp ^3, =5.92 BM B & [ Ni ( CN )₄ ]²⁻ & Q & sp ^3, =2.84 BM C & [ Ni ( Cl )₄ ]²⁻ & R & sp ^3, =0 D & [ MnBr ]²⁻ & S & dsp ^2, =0 array )

Step-by-step solution

For Ni(CO)₄ , the oxidation state of Ni is 0. The electronic configuration is [Ar] 3d^8 4s^2 . Since CO is a strong field ligand, it causes pairing of electrons, leading to sp^3 hybridization. All electrons are paired, so = 0 . This matches R. For [Ni(CN)₄]²⁻ , the oxidation state of Ni is +2. The electronic configuration is [Ar] 3d^8 . CN ^- is a strong field ligand, causing pairing of electrons in the 3d orbitals, resulting in dsp^2 hybridization. All electrons are paired, so = 0 . This matches S. For [Ni(Cl)₄]²⁻