Total number of geometrical isomers of $[Ma_3b_3]$ is/are:

Consider the following complex ions,$P$,$Q$ and $R$.
$P = [FeF_6]^{3-}$,$Q = [V(H_2O)_6]^{2+}$ and $R = [Fe(H_2O)_6]^{2+}$.
The correct order of the complex ions,according to their spin-only magnetic moment values (in $B.M.$) is

In the nitroprusside ion,iron and $NO$ exist as $Fe^{II}$ and $NO^{+}$ instead of $Fe^{III}$ and $NO$. Which method is used to confirm this?

Which of the following will show an increase in weight when kept in a magnetic field?

Which of the following complexes exhibits the highest paramagnetic behaviour? (where $gly = \text{glycine}$,$en = \text{ethylenediamine}$,and $bpy = \text{bipyridyl}$ moieties. At. nos. $Ti = 22, V = 23, Fe = 26, Co = 27$)

Which of the following pairs will have the same value of magnetic moment?