Among P 4 , S 8 and N 2 , the elements which undergo disproportionation when heated with NaOH solution

Step-by-step solution

Disproportionation reaction are those reactions in which same element undergoes oxidation as well as reduction. Among the given options P 4   and   S 8 undergoes disproportionation reaction in strong basic medium according to the following reaction. P 4 + 3 NaOH + 3 H 2 O ⟶ PH 3 + 3 NaH 2 PO 2 S 8 + 12 NaOH ⟶ Δ 2 Na 2 S 2 O 3 + 4 Na 2 S + 6 H 2 O Dinitrogen being very stable and almost inert does not undergoes this reaction.