Which of the following cations in their respective oxidation states develops a colorless aqueous solution?

What are the outermost $d$-orbitals for the second and third transition series,respectively?

Which of the following ions indicates the maximum magnetic moment?

Given below are two statements $:$
Statement $I : CrO_3$ is a stronger oxidizing agent than $MoO_3$
Statement $II : Cr(VI)$ is more stable than $Mo(VI)$
In the light of the above statements,choose the correct answer from the options given below.

The spin only magnetic moments (in $BM$) for free $Ti^{3+}, V^{2+}$ and $Sc^{3+}$ ions respectively are (At.No. $Sc: 21; Ti: 22; V: 23$)

The type of orbitals present in $Fe$ is