From $+6$ to $+1$ oxidation state is shown by the element of ....... group.

Which one of the following belongs to the $3d-$ transition series?

Which of the following elements in their respective oxidation states does not develop spin only magnetic moment? $[Ti (Z=22), Zn(Z=30), V(Z=23), Cu(Z=29)]$

The calculated magnetic moment (in Bohr magnetons) of $Cu^{2+}$ ion is:

The correct order of ionic radii of trivalent ions $Y^{3+}$,$La^{3+}$,$Eu^{3+}$,and $Lu^{3+}$ is $(Y=39, La=57, Eu=63, Lu=71)$.

The $d-$block element which is a liquid at room temperature,has a high specific heat,lower reactivity than hydrogen,and its chloride $(MX_2)$ is volatile on heating is