Which product is obtained during the reaction of $MnO_4^-$ with $I^-$ in a faintly alkaline condition?

Choose the correct option regarding the reaction $2KClO_3 \to 2KCl + 3O_2$.
$(1)$ $KClO_3$ undergoes both oxidation and reduction.
$(2)$ $Cl^{+5}$ is converted to $Cl^{-}$.
$(3)$ Oxygen in $KClO_3$ undergoes reduction.
$(4)$ This reaction cannot be called a redox reaction.

Which compound is formed when $H_2S$ gas is passed through an acidic solution of $KMnO_4$?

In mildly alkaline medium,thiosulphate ion is oxidized by $MnO_4^-$ to $A$. The oxidation state of sulphur in $A$ is ..... .

$PbS + 4O_3 \,\to ?\,+\,4O_2$

In the redox reaction $xMnO + yPbO_2 + zHNO_3 \to HMnO_4 + Pb(NO_3)_2 + H_2O$,determine the values of $x, y,$ and $z$.