The oxidation number of hydrogen in $LiH$ is

Oxidation number of $Mn$ in $K_2MnO_4$ and in $KMnO_4$ are respectively

Assign the oxidation number to the underlined element in each of the following species:
$1$. $NaH_{2}\underline{P}O_{4}$
$2$. $NaH\underline{S}O_{4}$
$3$. $H_{4}\underline{P_{2}}O_{7}$

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

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

In which one of the following changes is there a transfer of five electrons?