How many different types of oxidation numbers are exhibited by oxygen?

What are the oxidation numbers exhibited by oxygen?

What are the oxidation numbers exhibited by oxygen?

The most common oxidation number exhibited by C is

How many different type of functional groups are present in given compound.

How many different type of functional groups are present in following structure

How many different types of gametes are formed from AaBbCcDdEe?

How many different type of functional groups are presetn in following structure.

How many different types of sex determining mechanisms are found in animals?

If number of elements is 20 then how many different types of matrices can be formed if number of rows is always even?