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Question

Which is(are) true about N2O5?


A

It is an anhydride of nitric acid.

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B

In solid state, it exists as NO+2NO3

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C

It is structurally similar to P2O5

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D

It can be prepared by heating HNO3 over P2O5

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Solution

The correct option is D

It can be prepared by heating HNO3 over P2O5


N2O5 - Nitrogen (V) oxide can be prepared by heating HNO3 over the dimer of P2O5:

4HNO3+P4O102N2O5+4HPO3

N2O5+2H2O2HNO3

In the solid state, N2O5 exists as nitronium nitrate - NO+2NO3

The structure of nitrogen pentoxide is very different from phosphorus pentoxide:

P4O10


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