The atomic radius of $Ag$ is closest to

Which of the following species is paramagnetic? $Fe^{2+}, Zn^0, Hg^{2+}, Ti^{4+}$

Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest $E^{o}_{M^{3+} / M^{2+}}$ value?

Assertion : Borax bead test is not suitable for $Al(III)$.
Reason : $Al_2O_3$ is insoluble in water.

Which of the following is the correct order for the theoretical magnetic moment?

The metal ion (in gaseous state) with the lowest spin-only magnetic moment value is .... .