Among the species given below, the spin-only magnetic moment is highest for
(Given: Atomic number of $Ti = 22, Mn = 25, Fe = 26$ and $Co = 27$)

$A$ complex of the type $[M(AA)_{2}X_{2}]^{n+}$ is known to be optically active. What does this indicate about the structure of the complex? Give one example of such a complex.

In which of the following complex species,$\Delta_0 > P$ (pairing energy) with magnetic moment $\sqrt{3} \ B.M.$?

Match List-$I$ with List-$II$ and select the correct answer using the codes given below:

List-$I$	List-$II$
$I. [FeF_6]^{3-}$	$A. 1.73 \ BM$
$II. [Ti(H_2O)_6]^{3+}$	$B. 5.93 \ BM$
$III. [Cr(NH_3)_6]^{3+}$	$C. 0.00 \ BM$
$IV. [Ni(H_2O)_6]^{2+}$	$D. 2.83 \ BM$
$V. [Fe(CN)_6]^{4-}$	$E. 3.88 \ BM$

Which of the following complexes has the maximum number of unpaired electrons?

Consider the following metal complexes:
$1. [Co(NH_3)_6]^{3+}$
$2. [CoCl(NH_3)_5]^{2+}$
$3. [Co(CN)_6]^{3-}$
$4. [Co(NH_3)_5(H_2O)]^{3+}$
The spin-only magnetic moment value of the complex that absorbs light with the shortest wavelength is $B.M.$ (Nearest integer).