Among `[Ni(CO)_4], [NiCl_4]^(2-), [Co(NH_3)_4 Cl_2] Cl, Na_3 [CoF_6], Na_2O_2` and `CsO_2` the total number of paramagnetic compounds is . : 2, 3, 4, 5

Options

A. 2
B. 3
C. 4
D. 5

Answer

B

Explanation

`{:(,,"Unpaired electrons"),([Ni(CO)_4],3d^(10) (sp^3) , 0),([NiCl_4]^(2-),3d^8(sp^3),2),([Co(NH_3)_4Cl_2]Cl,3d^6(d^2 sp^3),0),(Na_3[CoF_6],3d^6(sp^3 d^2),4),(Na_2O_2, O_2^(2-),0),(CsO_2,O_2^(-),1):}`