What is the oxidation state of chlorine atom in hypochlorous acid?

What is the oxidation number of fluorine in $F_2O$?

What is the oxidation state of $Mn$ in $MnO_4^{-}$?

$2$ mole of $N_2H_4$ loses $16$ mole of electrons and is converted to a new compound $X$. Assuming that all of the $N$ atoms appear in the new compound,what is the oxidation state of $N$ in $X$?

Oxidation number of oxygen in ozone $(O_3)$ is

One mole of $N_2H_4$ loses $10 \ mol$ of electrons to form a new compound $Y$. Assuming that all nitrogen atoms appear in the new compound,what is the oxidation state of $N$ in $Y$? (There is no change in the oxidation state of hydrogen)