What is the equivalent weight of the oxidizing agent in the following reaction?
$SO_2 + 2H_2S \to 3S + 2H_2O$

Which of the following reagents forms a green precipitate $(ppt)$ with $KI$?

When hypo solution is added to cupric sulphate solution,the blue colour of the latter is discharged,due to the formation of:

The following reaction describes the rusting of iron:
$4Fe + 3O_2 \to 4Fe^{3+} + 6O^{2-}$
Which one of the following statements is incorrect?

In the following reaction,identify the oxidation states of the underlined phosphorus atoms in the products formed by complete hydrolysis at $R.T.$:
$H_4\underline{P}_2O_6 + H_2O \longrightarrow H_3PO_3 + H_3PO_4$

$2KMnO_4 + 3H_2SO_4 + 5H_2O_2 \rightarrow K_2SO_4 + 2MnSO_4 + 8H_2O + 5O_2$. Find the normality of $H_2O_2$ solution,if $20 \ mL$ of it is required to react completely with $16 \ mL$ of $0.02 \ M \ KMnO_4$ solution. (Molar mass of $KMnO_4 = 158 \ g \ mol^{-1}$)