What is the equivalent weight of $IO_4^-$ when it is converted to $I_2$ in an acidic medium?

What is the equivalent mass of $IO_4^-$ when it is converted into $I_2$ in an acidic medium?

$KMnO_4$ reacts in alkaline medium as follows:
$2KMnO_4 + 2KOH \to 2K_2MnO_4 + H_2O + O$
What is the equivalent weight of $KMnO_4$?
(Atomic weights: $K = 39, Mn = 55, O = 16$)

Assign $A, B, C, D$ from the given type of reaction.
$NH_4Cl + NaNO_2 \xrightarrow{\Delta} N_2 \uparrow + NaCl + 2H_2O$

For the reaction $Cr_2O_7^{2-} \xrightarrow{H^+} Cr^{3+}$,what is the equivalent weight of $Cr_2O_7^{2-}$?

The product of $I^-$ with $MnO_4^-$ in alkaline medium is