(a) `N_2O`

(i) `NH_4NO_3 -> N_2O +H_2O`

(ii) `(NH_4)_2SO_4 + NaNO_3 -> NH_4NO_3 + Na_2SO_4`

`NH_4NO_3 -> N_2O +2H_2O`

(iii) `Zn +undersettext(dil and cold)(HNO_3) -> Cu(NO_3)_2 + NO + H_2O`

(b) `NO`

(i) `Cu + HNO_3 undersettext(hot)((1 : 1)) -> Cu(NO_3)_2 + NO + H_2O`

(ii) `KNO_3 + FeSO_4 + H_2SO_4 -> Fe_2(SO_4)_3 + K_2SO_4 + NO + H_2O`

`FeSO_4 + NO -> FeSO_4*NO overset(Delta)-> FeSO_4 + NO uparrow`

(iii) Oswald process- Restricted oxidation of `NH_3`

Industrial process

`4NH_3 + 5O_2 underset(750^oC , text(Pt-cat.))oversettext(6 atm)-> 4NO + 6H_2O`

(c) `N_2O_3`

(i) `HNO_3 +As_2O_3 -> H_3AsO_4 +N_2O_3`

(ii) `Cu + HNO_3(6M) -> Cu(NO_3)_2 + (NO +NO_2)`

`(NO +NO_2) overset(text(Cool)(-30^oC_))-> text(Blue liq.) (N_2O_3)`

(d) `NO_2`

(i) `M(NO_3)_2 overset(Delta)-> MO +2NO_2 +1/2O_2`

`M` `= Pb`, `Cu`, `Ba`, `Ca`

(ii) `(Cu, Pb, Ag) + HNO_3 -> M-text(nitrate) + NO_2 + H_2O`

(e) `N_2O_5`

(i) `2HNO_3 + P_2O_5 -> 2HPO_3 +N_2O_5`

(ii) `4AgNO_3 +2Cl_2 text(dry gas) -> 4AgCl +2N_2O_5 +O_2`

(a) `text(Decomposition Behaviour)`

(i) `N_2O overset(500^oC -900^oC)-> 2N_2 +O_2`

(ii) `2NO overset(800^oC)-> N_2 +O_2`

(iii) `N_2O_3 underset(text(Blue liq. at ) -30^oC)oversettext(Room temprature)-> NO_2 +NO`

(iv) `2NO_2 overset(620^oC)-> 2NO +O_2`

`underset(text(white solid at) -11^oC)N_2O_4 overset(-11^oC)-> undersettext(Brown gas)(2NO_2)`

(v) `undersettext(coloureless solid)(N_2O_5) overset(30^oC)-> undersettext(yellow liq.)(N_2O_5) overset(-40^oC)->2NO_2 +1/2O_2`

(b) `text(Reaction with)` `H_2O` `&` `NaOH`

`text( )H_2O` `text( )NaOH`

`(i) text( )N_2O : text(Fairly soluble in water and produces neutral solution) , text( )---`
`(ii) text( )NO : text(Sparingly soluble in water and produce neutral solution) , text( )---`
`(iii) text( )N_2O_3 : 2HNO_2 text(Hence it is known as anhydride of) HNO_2,text( )NaNO_2,`
`(iv) text( )NO_2 : HNO_2 +HNO_3 text(called as mixed anhydride), text( )NaNO_2+NaNO_3`
`(v) text( )N_2O_5 : 2HNO_3 text(called as anhydride of) HNO_3,text( )NaNO_3`

`N_2O`

`2N_2O -> 2N_2 +O_2`

Hence it is better supporter for combustion {mixture contains `33%` `O_2` compared to `20%`}

`S +N_2O -> SO_2 +N_2`

`P + N_2O -> P_2O_5 + N_2`

`Mg + N_2O -> MgO + N_2`

`Na + N_2O -> Na_2O + N_2`

`Cu + N_2O -> CuO + N_2`

`H_2 + N_2O -> H_2O + N_2`

`NO :` (i) It burns : `NO + 1/2 O_2 -> NO_2`

(ii) It supports combustion also for molten sulphur and hot phosphorous.

`S + 2NO -> SO_2 + N_2`

`2P + 5NO-> P_2O_5 + 5/2 N_2`

(iii) It is being absorbed by `FeSO_4` solution.

(iv) It is having reducing property.

`KMnO_4 +NO+ H_2SO_4 -> K_2SO_4 + MnSO_4 + HNO_3 + H_2O`

`HOCl +NO + H_2O -> HNO_3 + HCl`

(v) `NO` shows oxidising property also.

`SO_2 + 2NO + H_2O -> H_2SO_4 + N_2O`

`H_2S + 2NO -> H_2O + S downarrow + N_2O`

`3SnCl_2 + 2NO + 6HCl -> 3SnCl_4 + 2NH_2OH`

(Used for `NH_2OH` preparation)

(vi) `NO` combines with `X_2` (`X_2` = `Cl_2`, `Br_2`, `F_2`) to produce `NO X`

`2NO +X_2 -> 2NOX`

`N_2O3 :` No more properties

`NO_2 : (i)` It is having oxidising property.

`S +N O_2 -> SO_2 +NO`

`P + NO_2-> P_2O_5 + NO`

`C + NO_2 -> CO_2 + NO`

`SO_2 + NO_2 + H_2O -> H_2SO_4 +NO`

`H_2S + NO_2-> H_2O + S downarrow +NO`

`CO + NO_2 -> CO_2 +NO`

`text(NO not formed)` : `2KI +2NO_2 -> I_2 + 2KNO_2`

(ii) Reducing property of `NO_2`

`KMnO_4 + NO_2 + H_2SO_4 -> K_2SO_4 + MnSO_4 + HNO_3 + H_2O`

`O_3^0 + overset(+4)(2NO_2) -> O_2^0+overset(+5)(N_2O_5)`


`N_2O_5 :`

`I_2 + 5N_2O_5 -> I_2O_5 + 10NO_2`

`I_2O_5` is used for the estimation of `CO`.

`I_2O_5 + 5CO -> I_2 + 5CO_2`

`I_2 + 2S_2O_3^(2-) -> 2I^(-) + S_4O_6^(2-)`

`N_2O_5 + NaCl -> NaNO_3 + NO_2`

This likes proves that `N_2O_5` is consisting of ion pair of `NO_2^(+)` & `NO_3^(-)`

See Table.