All the products formed in the oxidation of $NaBH_4$ by $I_2$ are

In basic medium,$H_{2}O_{2}$ exhibits which of the following reactions?
$A$. $Mn^{2+} \rightarrow Mn^{4+}$
$B$. $I_{2} \rightarrow I^{-}$
$C$. $PbS \rightarrow PbSO_{4}$
Choose the most appropriate answer from the options given below:

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases $H_2O_2$ acts as a reducing agent in acidic medium?

Which of the following statements is incorrect?

Which of the following compounds can produce $H_2O_2$ on electrolysis followed by hydrolysis?

Which of the following statements is correct?