(i) -hybridisation
(ii) Inner orbital complex because -orbitals are used.
(iii) Paramagnetic, as two unpaired electrons are present.
(iv) Spin only magnetic moment

pair up the unpaired electrons.)
(i) -hybridisation
(ii) Inner orbital complex because of the involvement of -orbital in bonding.
(iii) Diamagnetic, as no unpaired electron is present.
(iv)

(i) -hybridisation
(ii) Inner orbital complex [as -orbitals take part.]
(iii) Paramagnetic (as three unpaired electrons are present.)

(i) -hybridisation
(ii) Outer orbital complex because nd-orbitals are involved in hybridisation.
(iii) Paramagnetic (because of the presence of four unpaired electrons).
(iv)