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Among [Ni(CO)(4)], [NiBr4]^(2-), [Co(NH3...

Among `[Ni(CO)_(4)], [NiBr_4]^(2-), [Co(NH_3)_(4)Cl_2]Cl, Na_3[CoF_6], BaO_2 and CsO_2`, the total number of diamagnetic compounds is

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The correct Answer is:
3
`{:("Compound/Iron", "Magnetic nature of compound"),([Ni(CO)_(4)],"Diamagnetic"),([NiCl_(4)]^(2-), "Paramagnetic"),([Co(NH_(3))_(4)Cl_(2)]Cl, "Diamagnetic"),(Na_(3)[CoF_(6)],"Paramagnetic"),(Na_(2)O_(2), "Diamagnetic"),(CsO_(2), "Paramagnetic"):}`
So, total number of paramagnetic compounds is 3.
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