Transition elements act as catalysts because....

Which of the following properties is not characteristic of transition metals?

The colour of an electrolyte solution depends on

Magnetic moment of $Gd^{3+}$ ion $(Z = 64)$ is .......... $B.M.$

The correct statement$(s)$ about $Cr^{2+}$ and $Mn^{3+}$ is(are)
[Atomic numbers of $Cr = 24$ and $Mn = 25$]
$(A)$ $Cr^{2+}$ is a reducing agent
$(B)$ $Mn^{3+}$ is an oxidizing agent
$(C)$ Both $Cr^{2+}$ and $Mn^{3+}$ exhibit $d^4$ electronic configuration
$(D)$ When $Cr^{2+}$ is used as a reducing agent,the chromium ion attains $d^3$ electronic configuration

Which of the following ions are diamagnetic?