When metals corrodes, it is being :
The oxidation number of hydrogen is -1 when it combines with non-metals and +1 when it combined with metals.
Question 11 What type of oxides are formed when non-metals combine with oxygen?
(a) What type of oxides are formed when non-metals react with oxygen ? Explain with an example. (b) What is the nature of oxides are formed when metals combine with oxygen? Explain with the help of an example.