What is the oxidation state of chromium in the final product formed by the reaction between $KI$ and acidic $K_2Cr_2O_7$ solution?

How many moles of acidified $K_{2}Cr_{2}O_{7}$ are required to liberate $6$ moles of $I_{2}$ from an aqueous solution of $I^{-}$?

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

Write the balanced chemical equations for the following reactions:
$(1)$ Reaction between $MnO_4^-$ and $I^-$ in neutral or faintly alkaline solution.
$(2)$ Reaction between $MnO_4^-$ and $C_2O_4^{2-}$ in acidic medium $(H^+)$.

Discuss the types of redox reactions in detail.

$Na_2S_2O_3$ reacts with moist $Cl_2$ to form $Na_2SO_4$, $HCl$, and $X$. Which one of the following is $X$?