When silver nitrate is heated to red hot,what is formed?

The number of moles of $KMnO_4$ required to oxidize one equivalent of $KI$ in the presence of sulphuric acid is

Assign $A, B, C, D$ from the given type of reaction:
$2AgNO_3 + 2NaOH \longrightarrow Ag_2O \downarrow + 2NaNO_3 + H_2O$

When $KMnO_4$ reacts with acidified $FeSO_4$,which of the following occurs?

$H_2O_2$ with $KMnO_4$ in acidic medium gives a manganese compound '$X$' and in basic medium gives another manganese compound '$Y$'. The oxidation state of manganese in $X$ and $Y$,respectively are

Which of the following is not correct?