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The nitrogen containing compound produced in the reaction of HNO3 with P4O10 is:
A. can also be prepared by reaction of P4and HNO3
B. is diamagnetic
C. contains one NN bond
D. reacts with Na metal producing a brown gas.

Answer
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Hint: The nitrogen containing compound produced in the reactions of HNO3 with P4O10 is N2O5. . The name of the compound formed is dinitrogen pentoxide and it is one of the members of the family of compounds that contain only nitrogen and oxygen.

Complete step by step answer: The reaction of HNO3 and P4O10 result in the production of nitrogen containing compound N2O5
The reaction involved is :
4HNO3+P4O102N2O5+4HPO3
In the option A,
P4+20HNO34H3PO4+20NO2+4H2O
So, with P4 and HNO3 we cannot produce the some nitrogen compound that was prepared with P4O10 and HNO3
In option B, it is said that the compound N2O5. produced is diamagnetic in nature as it does not contain any unpaired electron.
For option C, it explains that there is One NN bond in N2O5 but no there is no such bond. The structure of N2O5 is :
seo images

For option D, it reveals that the reaction of N2O5 with Na metal produces a brown gas. So, the reaction of N2O5 with Na produces NO2 which is a reddish – brown gas. Hence, this option is also there.
The reaction is :
N2O5+NaNaNO3+NO2 .
Therefore, the options B and D are the correct one.

Additional Information: Dinitrogen pentoxide is an unstable and dangerous oxidizer. it generally exists as colourless crystals and sublimes at temperature slightly above room temperature yielding a colorless gas. It is a compound that adopts two structures depending upon the conditions. In a solid state it is a salt, nitronium nitrate and in the gaseous phase it is a covalently bonded molecule.

Note: The compound formed that is dinitrogen pentoxide is also known as nitric anhydride. It is a strong oxidizer that produces explosive mixtures with organic compounds and ammonium salts. It produces highly toxic gas nitrogen dioxide on decomposition.