The reaction of aqueous $KMnO_4$ with $H_2O_2$ in acidic conditions gives

How many electrons are needed to reduce $N_2$ to $NH_3$?

What is the equivalent weight of $KMnO_4$ in acidic medium (in $g$)? (Molecular weight of $KMnO_4 = 158 \ g$)

In alkaline medium,the reduction of permanganate anion involves a gain of $........$ electrons.

The reaction of white phosphorus on boiling with alkali in an inert atmosphere results in the formation of product '$A$'. The reaction of $1 \ mol$ of '$A$' with an excess of $AgNO_3$ in an aqueous medium gives ............... $mol(s)$ of $Ag$. (Round off to the Nearest Integer).

Write the net ionic equation for the reaction of potassium dichromate$(VI)$,$K_{2}Cr_{2}O_{7}$ with sodium sulphite,$Na_{2}SO_{3}$ in an acidic solution to give chromium$(III)$ ion and the sulphate ion.