" In the compound `NOCIO_(4)` the oxidation state of N is "

In the compound NOClO_(4) ,the oxidation state

The oxidation state of N in HNO_(4) is

In the compound NCl_(3) , negative oxidation state is exhibited by

2 mole of N_(2)H_(4) loses 16 mole of electron is being converted to a new compound X . Assuming that all of the N appears in the new compound. What is the oxidation state of 'N' in X ?