The p-Block Ele...

No. of water molecules in mohr's salt is :

In silica $$(SiO_2)$$, each silicon atom is bonded to:

The only element of group 13 which does not form a passive layer on the surface while dissolving in con. $$HNO_3$$, but dissolve to form complex is:

Boron forms ionic compounds due to :

Oxidation of $$Al$$ is used in :

The hardest substance among the following is:

Boron shows single oxidation state due to absence of :

In $$3^{rd}\ A$$ group $$Tl$$ shows +$$\mathrm{1}$$ oxidation state while other member shows +$$3$$ oxidation state due to :

Bauxite containing impurities of iron oxide is purified by :

Which of the following has least tendency of catenation?