What is the oxidation number of $Cl$ in $CaOCl_2$?

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

Equivalent weight of $KMnO_4$ acting as an oxidant in acidic medium is equal to

Assign oxidation number to the underlined elements in each of the following species:
$(a)$ $NaH_2\underline{P}O_4$
$(b)$ $NaH\underline{S}O_4$
$(c)$ $H_4\underline{P_2}O_7$
$(d)$ $K_2\underline{Mn}O_4$
$(e)$ $Ca\underline{O_2}$
$(f)$ $Na\underline{B}H_4$
$(g)$ $H_2\underline{S_2}O_7$
$(h)$ $KAl(\underline{S}O_4)_2 \cdot 12H_2O$

The correct order of the oxidation states of nitrogen in $NO$,$N_2O$,$NO_2$,and $N_2O_3$ is:

Which one of the following reactions does not involve either oxidation or reduction?