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

The correct order of the spin only magnetic moment of metal ions in the following low spin complexes,$[V(CN)_6]^{4-}$,$[Fe(CN)_6]^{4-}$,$[Ru(NH_3)_6]^{3+}$,and $[Cr(NH_3)_6]^{2+}$,is

Total number of relatively more stable isomer$(s)$ possible for octahedral complex $[Cu(en)_2(SCN)_2]$ will be $.........$

Given below are two statements:
Statement $I$: $A$ solution of $[Ni(H_2O)_6]^{2+}$ is green in colour.
Statement $II$: $A$ solution of $[Ni(CN)_4]^{2-}$ is colourless.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following complex compounds will exhibit highest paramagnetic behaviour? (At. No. $Ti = 22$,$Cr = 24$,$Co = 27$,$Zn = 30$)

What is the value of the magnetic moment of $Co^{2+}$ (in $BM$)?