$MnO_4^{-}$ reacts with $A^{x+}$ to form $AO_3^{-}$,$Mn^{2+}$ and $O_2$. One mole of $MnO_4^{-}$ oxidizes $1.25$ moles of $A^{x+}$ to $AO_3^{-}$. What is the value of $x$?

Assign $A, B, C, D$ from the given type of reaction for the following chemical equation:
$PCl_5 \xrightarrow{\Delta} PCl_3 + Cl_2$

In the reaction of sodium thiosulphate with $I_2$ in aqueous medium, the equivalent weight of sodium thiosulphate is equal to:

Consider the following statements:
In the chemical reaction:
$MnO_2 + 4HCl \to MnCl_2 + 2H_2O + Cl_2$
$(1)$ Manganese ion is oxidised
$(2)$ Manganese ion is reduced
$(3)$ Chloride ion is oxidised
$(4)$ Chloride ion is reduced.
Which of these statements are correct?

For the balanced redox reaction $a C_2O_4^{2-} + b MnO_4^- + c H^+ \rightarrow x Mn^{2+} + y H_2O + z CO_2$, the values of $a$ and $x$ respectively are:

One mole of potassium dichromate completely oxidises the following number of moles of ferrous sulphate in acidic medium.