Question

Acidity, basicity and amphoteric based on oxidation numbers of d-block metals

Answer 1

Answer:

d-block element's have variable valency so we can't say that it's having a oxidation number

Answer 2

Answer:

• If any element that has a range of an oxidation states, and it will be ‘acidic in nature’ at its “extreme positive oxidation state”, while it is the ‘most basic in nature’ at the extreme negative oxidation.

• Amphoterism is depends on ‘the oxidation state’ of the oxides completely and ability to polarize the oxide ions that are in surrounding of the metal.

• This ability is increase with the oxidation state as the “positive character” of the centre atom increases.

• In the Group 15, the oxides with ‘lower oxidation states’ only are amphoteric.