Consider the statements: (I) NO2 reacts with cold water to give HNO2 and HNO3. (II) Solid N2O5 consists of NO2+ and NO3- ions. (III) N2O is paramagnetic. (IV) NO2 is paramagnetic. The number of correct statements is

JEE Advanced levelSingle correct optionDifficulty 3 of 3pn177

Consider the statements: (I) $NO X_{2}$ reacts with cold water to give $HNO X_{2}$ and $HNO X_{3}$ . (II) Solid $N X_{2} O X_{5}$ consists of $NO X_{2} X^{+}$ and $NO X_{3} X^{-}$ ions. (III) $N X_{2} O$ is paramagnetic. (IV) $NO X_{2}$ is paramagnetic. The number of correct statements is

(I) true: disproportionation,

2 NO X_{2} + H X_{2} O HNO X_{2} + HNO X_{3}

. (II) true: solid

N X_{2} O X_{5}

[NO X_{2}] X^{+} [NO X_{3}] X^{-}

. (III) false:

N X_{2} O

has 16 valence electrons, all paired. (IV) true: odd-electron molecule. Three statements are correct.