Permanganate ion (MnO$$_4^ - $$) is dark purple coloured though Mn is in + 7 oxidation state with d0 configuration. This is due to

Which is true in case of [Ni(CO)4]?

Magnetic moment of in [Co(F6)]2$$-$$ of unpaired electron .......... .

What is the hybridisation of [CrF6]3$$-$$ ?

Select the correct statement about the complex [Co(NH3)5SO4] Br.