Write down the names of crystal structures in which the following elements are presents:
Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn`
(b). Which is more basic?
(i). `ZrO_2` or `TiO_2` (ii). `V-2O_5` or `Nb_2O_5` (iii). `OsO_4` or `ReO_2`
(c). Which is more oxidising agent `Cr(IV)` or `Mo*+(VI)`?