Non metal oxides are

A part of Ellingham diagram for some metal oxides (based upon 1 mole of O_2 ) and carbon is shown. In figure A, B, C and D represent curves for metal oxides and a, b, c, d, e and f are temperatures. Answer the following : Will B oxide reduce metal oxide of A or C or both ?

What is the nature of metal oxides?

By dissolving metal oxide in water, we get

(a) Write a metal oxide compound for manganese in each of the following oxidation states: +2, +3, +4, +6, +7. (b) List these metal oxides in the decreasing acidic character.

Experimentally it was found that a metal oxide has formula M_(0.98)O . Metal M is present in M^(2+) and M^(3+) in its oxide. Fraction of the metal which exists as M^(3+) would be

How is the variability in oxidation states of transition metals different from that of the non transition metals? Illustrate with examples.

Non-metal on the base of hardness is: