In the reaction $3Mg + N_2 \to Mg_3N_2$,which of the following is correct?

$H_2S$ reacts with halogens,the halogens

What is the function of $O_2$ intake by respiration in the body?

In the reactions given below,identify the species undergoing oxidation and reduction:
$(i)$ $H_{2}S_{(g)} + Cl_{2(g)} \rightarrow 2HCl_{(g)} + S_{(s)}$
$(ii)$ $3Fe_{3}O_{4(s)} + 8Al_{(s)} \rightarrow 9Fe_{(s)} + 4Al_{2}O_{3(s)}$
$(iii)$ $2Na_{(s)} + H_{2(g)} \rightarrow 2NaH_{(s)}$

Which of the following represents the most oxidized form of hydrocarbon?

In a reaction between zinc and iodine,in which zinc iodide is formed,what is being oxidised?