JEE Main · 2021 · 17 Mar 2021 · Shift 2 · p-Block Elements

The set that represents the pair of neutral oxides of nitrogen is:

(A) $N_{2} O$ and $N_{2} O_{3}$
(B) $N_{2} O$ and $NO_{2}$
(C) $NO$ and $NO_{2}$
(D) $NO$ and $N_{2} O$ ✓ Correct

Answer: (D)

Solution

A neutral oxide gives no salt either with an acid or with an alkali. Nitrous oxide and nitric oxide dissolve in water without forming an oxoacid and are unattacked by alkali, so both are neutral. Dinitrogen trioxide is the anhydride of nitrous acid, and nitrogen dioxide disproportionates in water to nitrous and nitric acids, so both of these react with alkali to give salts and are acidic. The neutral pair of nitrogen oxides is

NO

and

N_{2} O

JEE Main · 2021 · 17 Mar 2021 · Shift 2 · Single correct option

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