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The correct order of matching of complex...

The correct order of matching of complex compound in column I with the properties in column II:
`{:(,"Column I",,"Column II",),((A),[Cr(NH_(3))_(6)]^(3+),(P),"Tetrahedral and paaramagnetic",),((B),[Co(CN)_(6)]^(3-),(Q),"Octahedral and diamagnetic",),((C ),[Ni(CN)_(4)]^(2-),(R ),"Octahedral and paramagnetic",),((D),[Ni(Cl)_(4)]^(2-),(S),"Square planar and diamagnetic",):}`

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{:("Column-I","Column-II"),((A)[Ni(CO)_4],(p)"Octahedral paramagnetic"),((B)[Ni(CN)_4]^(-2),(q)"Square planar diamagnetic "),((C)[Ni(NH_3)_6]^(+2),(r)"Tetrahedral diamagnetic "),((D )[NiCl_4]^(-2), (s)"Tetrahedral paramagnetic"):}

Which statement is incorrect? (A) Ni(CO)_4 - Tetrahedral,paramagnetic (B) [Ni(CN)_(4)]^(2-) square planar,diamagnetic (C) [Ni(NH_(3))_(6)]^(2+) Octahedral,paramagnetic (D) [NiCl_(4)]^(2) Tetrahedral,paramagnetic

Match the complex ions listed in column-I with the characteristics listed in column-II using the codes gives below. {:("Column-I","Column-II"),((a)[Ni(NH_3)_6]^(2+),(p)d^2sp^3"and diamagnetic"),((b)[Cr(NH_3)_6]^(3+),(q)sp^3d^2"and diamagnetic"),((c )[Co(NH_3)_6]^(3+),(r)sp^3d^2"and two unpaired electrons"),((d)[Zn(NH_3)_6]^(2+),(s)d^2sp^3"and three unpaired electrons"):}

[Cr(NH_(3))_(6)]^(3+) is paramagnetic while [Ni(CN)_(4))]^(2-) is diamagnetic Why ?

{:("COLUMN-I","COLUMN-II"),((A)[Mn(H_(2)O)_(6)]^(2+),(p)"Paramagnetic"),((B)[Mn(CN)_(6)]^(3+),(q)"Diamagnetic"),((C)[Co(NH_(2))_(6)]^(3+),(r)"High spin complex (or) outer orbital complex"),((D)[Ni(NH_(3))_(6)]^(2+),(s)"Low spin complex (or) inner orbital complex"):}

Match the molecules/ions in Column-I with shapes in Column-II {:("Column-l ","Column-II"),((A) BeCI_(2) ,(P) "Square planar "),((B) [PCI_(4)]^(+),(Q)"Linear"),((C) XeF_(4),(R) "Tetrahedral"),((D) XeO_(3),(S)"Pyramidal"):}