The nitrogen containing compound produced in the reaction of $\mathrm{HNO}_{3}$ with $\mathrm{P}_{4} \mathrm{O}_{10}$

(B) is diamagnetic; (D) reacts with Na metal producing a brown gas

(A) can also be prepared by reaction of $\mathrm{P}_{4}$ and $\mathrm{HNO}_{3}$

(C) contains one $\mathrm{N}-\mathrm{N}$ bond

JEE Advanced · 2016 · 22 May 2016 · Paper 2 · p-Block Elements

The nitrogen containing compound produced in the reaction of

HNO_{3}

with

P_{4} O_{10}

Answer: (B), (D)

P_{4} O_{10}

dehydrates

HNO_{3}

to form

N_{2} O_{5}

. This compound is diamagnetic (all electrons paired). It does not contain an N-N bond (structure is

O_{2} N - O - NO_{2}

). It reacts with Na to produce

NO_{2}

(brown gas). It cannot be prepared from

P_{4}

and

HNO_{3}

(that would oxidize phosphorus).

JEE Advanced · 2016 · 22 May 2016 · Paper 2 · One or more correct options